Best High-Speed Internal Hard Disk Drives (HDD) [2016]

Best Internal 3.5-inch desktop hard disk drive (HDD)

If your main concern in a hard drive is SPEED and you want the fastest HDD out there, we strongly advise you to check our Desktop SSD Guide first

The traditional mechanical hard disk drive (HDD) is still the most common storage subsystem in all modern systems, especially after the effective and remarkable improvements the HDD manufacturers carried out in terms of performance, reliability, capacity and prices. Now modern hard drives are way more reliable than their old predecessors and offer huge storage capacity up to 12TB in enterprise environment with extreme performance.

UPDATE: In August 2016, Seagate released the fastest hard drive on the planet—Barracuda PRO HDD with 10TB of storage capacity. It’s designed primarily for elite professionals, that’s why we haven’t included it in our recommendation list.

The Best Internal Desktop Hard Drives (HDD)

We prefer to start this guide first with the list of our recommendations in HDD space in order to make it easier and “shorter” for quick readers who are in pressure of time. Then below that list you will find a short guide that’s worth to name “essential primer”, which includes informative tips and enlightening solutions every hard drive buyer must be aware of so as to make the right decision of purchase.

So let’s start first with our recommendations for the best and fastest hard disk drives (HDD):

Internal Desktop HDD Roundup

Western Digital (WD)
Founded on April 23, 1970, Western Digital Corporation (commonly referred to as Western Digital and often abbreviated as WDC or WD) is an American computer data storage company and one of the largest computer hard disk drive manufacturers in the world, along with Seagate Technology.

WD Desktop Black

Western Digital Black Performance Hard Drive The WD Black is designed to give an overall boost for heavier computing tasks, while offering a good cost per TB. It is an ideal internal storage solution for power consumers looking for the highest possible performance from the market’s current hard disk drive technology as well as those looking for an alternative to the more expensive hybrid drives. The 5tb and 6tb models of this product line are the newest release in the consumer hard drive market (Date first available on the market is: July 14, 2015) and they were seconded with the newest and most improved digital storage technologies that make us say, without doubt, they are the fastest 5tb and 6tb consumer hard drive available as of today.
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Capacity Model # Where to Buy
Official Product Description: WD Black hard drives are designed for desktop PC power users who demand performance. Give your system the high capacity, reliability and robust performance only available in a WD Black drive, that includes a 5-year limited warranty. WD Black hard drives are put through extensive testing in WD’s FIT Lab so that customers have a reliable hard drive they can trust when storing their digital content.
Additional Note: The new 5TB/6TB WD Black HDD offers both a significant increase in storage and noticeable boost in performance. With WD’s latest effort, enthusiasts/professionals will certainly see an overall boost in heavier computing, as it effectively leverages WD’s latest drive technology along with 128MB of DRAM and Dynamic Cache Technology. The latter improves caching algorithms in real time by allocating and optimizing cache between reads and writes. As such, power consumers and gamers with a hefty capacity footprint will find a lot to like with the WD Black 5TB/6TB HDD.
Basic Features
  • Designed for creative professionals, gamers and system builders
  • WD’s StableTrac(TM) and Dynamic Cache Technology increase reliability and optimize performance
  • 2X DRAM cache up to 128 MB (6TB, 5 TB only) for faster read operations
  • Package includes a hard drive only – no screws, cables, manuals included. Please purchase mounting hardware and cables separately if necessary.
  • Industry-leading 5-year manufacturer limited warranty
To download this drive’s official datasheet, click here
Awards & Testimonials

WD Black HDD Award Board

Silent Pc Review Nov 23, 2015

While its mechanical nature prevents it from being as nimble as a SSD, it is the fastest hard drive we’ve tested.

Hardware Canucks Dec 26, 2015

When you add in the reduced power consumption and a five year hassle-free warranty, this drive may just be the perfect HDD for everyone from gamers, to environmentally concerned consumers, to even small form-factor system builders. Western Digital has just breathed new life into their flagship lineup in a big way.

The PC Enthusiast Oct 29, 2015

Based on the tests and the benchmark results that I got, there’s no doubt that the WD Black 6TB WD6001FZWX is currently the fastest hard drive I have ever tested. It’s faster than the lower capacity WD Black, or any color of WD drives available.

Finally, WD has made a fantastic product in the form of the WD Black 6TB hard drive. This proves that the company continues to really push the boundaries of their storage solution. The WD Black 6TB is also back with a 5 year warranty making it a must have storage drive specially for those who are looking for a high performance storage solution.


WD offers more alternatives to mainstream-class users with minimum 2-year limited warranty and maximum 4TB capacity. The items below are in the descending order according to the superiority of the drive.

Seagate Technology PLC (commonly referred to as Seagate) is an American-founded data storage company. Seagate is one of the global leaders in data storage solutions, developing amazing products that enable people and businesses around the world to create, share and preserve their most critical memories and business data.

Seagate Enterprise

Seagate Enterprise Capacity Hard Drive Since it’s first release in 2014 up until the emergence of WD Black 6TB, the Seagate Enterprise Capacity V.4 was billed as the “world’s fastest” nearline HDD currently on the market, with claims of performance 25% over competitive offerings. With an operating speed of 7200RPM, the Seagate V.4 comes in 6TB, 5TB, 4TB and 2TB flavors. Each type can be purchased with either 12Gb/s SAS or 6Gb/s SATA connectivity, allowing it to be easily integrated into current systems. Seagate also supports optional SED and FIPS encryption.
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Capacity Model # Where to Buy
6 TB ST6000NM0024
5 TB ST5000NM0024
4 TB ST4000NM0053
3 TB ST3000NM0033
2 TB ST2000NM0033
1 TB ST1000NM0033
Official Product Description: Supporting one of the industry’s best response times today for a 6TB nearline drive, the Enterprise Capacity 3.5 HDD with it’s multi-drive RV-tolerance capabilities enables faster data transfers by utilizing the latest interfaces on a trusted platform. And for reliable access to bulk storage, the Enterprise Capacity 3.5 HDD provides excellent IOPS/TB along with the reliability, availability and serviceability that your customers expect.
Basic Features
  • World’s fastest 6, 5, 4 and 2TB nearline hard drives
  • 10x the workload rating of desktop drives
  • High 24×7 reliability with an MTBF of 1.4M hours on all drives
  • 12Gb/s SAS and SATA 6Gb/s interfaces for easy integration
  • Best-in-class IOPS/TB storage for unstructured data
  • Seagate Instant Secure Erase feature on SED drives for secure, easy and cost-effective drive retirement
  • RV Sensors and RAID support for maximum multi-drive nearline performance
  • Industry-leading 5-year manufacturer limited warranty
To download this drive’s official datasheet, click here
Awards & Testimonials

Seagate Enterprise Capacity v4 Award Board

Hot Hardware Dec 29, 2014

The Seagate drive’s average read/write speed of 164MB/s is the fastest we’ve ever seen from a drive with rotating platters, even besting the former champ, WD’s 10krpm Velociraptor by a hair. The fact that the Seagate drive is faster despite its slower rotational speed shows you just how much of an advantage areal density can be.

Tweak Town May 07, 2014

The Seagate Enterprise Capacity 3.5 HDD v4 delivers a big jump in density, impressive performance gains, and even increased power efficiency. With its five-year warranty, class-leading performance, and host of enterprise class features, it earns the TweakTown Editor’s Choice Award.

Overclockers Club Jul 14, 2014

Well, I think it is safe to say that the Seagate Enterprise Capacity 6TB 3.5 HDD v4 is indeed a BEAST. I think I’ve said “beast” quite enough times throughout the review, often more referring to the size of this drive, but along with its large capacity is some rather large and impressive numbers to go with it.


Seagate offers more alternatives to mainstream-class users with minimum 2-year limited warranty and maximum 4TB capacity. The items below are arranged in the descending order according to the superiority of the drive.

Toshiba Corporation (commonly referred to as Toshiba, stylized as TOSHIBA) is a Japanese multinational conglomerate corporation headquartered in Tokyo, Japan. Its diversified products and services include information technology and communications equipment and systems, electronic components and materials, power systems, industrial and social infrastructure systems, consumer electronics, household appliances, medical equipment, office equipment, lighting and logistics.

Toshiba X300

Toshiba X300 Extreme Performance The X300 is geared for high-end or pro users, such as graphic designers and gamers, as well as all other users, with a focus on extreme performance and reliability to handle intense desktop computing with ease. This 3.5-inch high-capacity hard drive offers up to 6TB of storage capacity, plus a wealth of data protection features, and is backed by a 2-year standard limited warranty.
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Capacity Model # Where to Buy
Official Product Description: Seeking massive capacity and extreme performance for pro-level gaming, graphic design and animation? Make sure your desktop is powered by the Toshiba X300 Series 3.5” desktop internal hard drive and explore a whole new world of awesome speed and performance. Offering massive storage of up to 6TB, plus a wealth of advanced data protection features built-in, this drive delivers impressive high-storage density and capacity that can keep you moving at lightning-fast speed. Whether you’re deep into AutoCAD files, animated graphics and video editing-or staying right in the action with your favorite games-this drive delivers serious real-time performance and advanced features, too. It combines Toshiba’s time-tested hard drive technology with an internal shock sensor and ramp-loading technology for enhanced drive and data protection, plus the advantages of an intelligent Serial ATA interface, state-of-the-art Perpendicular Magnetic Recording (PMR) technology, Native Command Queuing (NCQ) support and Tunnel Magneto-Resistive (TMR) recording head technology for exceptional speed and reliability. When you need extreme performance to meet tough demands, look no further than the X300 drive. It delivers all you need, and more.
Basic Features
  • High storage density and capacity with up to 6TB of storage-Tackle extreme tasks and accommodate a massive collection of large digital files with spacious storage capacity
  • Compatible with Windows Mac and Linux
  • Intelligent Serial ATA interface ensures compatibility with most major brands of Serial ATA enabled laptop PCs
  • Native Command Queuing (NCQ) support enhances seek-time performance
  • Internal shock detection and ramp-loading technology help protect your drive and data
  • Perpendicular Magnetic Recording (PMR) technology offers higher capacities, excellent reliability and robustness
  • Tunnel Magneto-Resistive (TMR) recording head technology delivers improved stability
  • Built-in cache algorithm and buffer management enhance real-time read/write performance
  • Industry-leading 2-year manufacturer limited warranty
To download this drive’s official datasheet, click here
Awards & Testimonials

This drive has not been reviewed yet as far as we know.


Seagate offers more alternatives to mainstream-class users with minimum 2-year limited warranty and maximum 4TB capacity. The items below are arranged in the descending order according to the superiority of the drive.

The Purpose of Composing This Guide

HDD guide purposeThere are many hard drive brands out there on the market, some of which are obsolete, slow, unreliable and have their own performance issues, and some of which are new and meet the current high standards of a storage device in modern high-end systems.

On the other hand, there are two classes of hard drives—Enterprise hard drives that are primarily designed for enterprise space and a regular user wouldn’t have any valid reason to obtain one while they only want a hard drive for their basic/mediocre digital tasks. The second class is mainstream hard drive which fits the needs of the overwhelming majority of users who look for adequate performance, good speed and reasonable price.

These hard drives are all mixed together in a big mess on the market, and most users don’t have the time to make their own research on each drive to figure out whether it’s suitable or not. For this reason the idea of this guide arose in a pursuit to put things in their right places and make it easier for our readers to find the exact match for their needs.

We consider this guide as the ultimate reference for the best and fastest modern hard disk drives online because it presents rich pieces of information about the topic it handles, provided with a unique list of the top performing modern hard drives set in a decent arrangement that distinguishes enthusiast drives from mainstream.

Common specifications of listed drives

HDD guide purposeAll hard drives listed below share the following specifications:

  • Designed as internal desktop drives with 3.5-inch form factor. That means none of these drives will fit into laptop computers, neither fit to be used for a portable external storage structure.
  • Powered by SATA III interface. That’s to confine this guide to consumer-level hard drives by excluding SCSI form factor that’s mainly made for enterprise space. Moreover, we excluded obsolete interfaces like IDE and earlier versions of SATA. Having these drives powered by SATA III interface would open the door wide for the hard drive to perform at its peak level, particularly if your motherboard already supports that version of SATA.
  • The year of manufacturing isn’t before 2013. Although most of the drives in our list were launched in the period between 2014 and 2016 [The newest is Toshiba X300 and P300 (check the last option in our list)]. That way we make sure that the most advanced HDD technologies have been implemented in these drives.
  • Minimum term of warranty is 2 years. The term of warranty indicates how reliable a hard drive is, because it’s determined by the endurance rate in tough environment under robust data tests. Most of the listed drives have a term of warranty ranging from 3 years to 5.
  • No less than 1TB capacity. Although we don’t recommend less than 2TB capacity for regular users and not less than 4TB for enthusiasts, there are still a minority of users who feel that 1TB is pretty much enough for their needs for the near future (that’s 2-3 years). Because of that we included that small capacity in our list also, but not any less than that.
  • Renowned brands. These drives are all designed by the most prominent and highly-reputed manufacturers in the HDD industry that have been there for decades producing the highest quality hard drives. We don’t authorize unknown or new-in-the-industry firms.

More about the hard disk drive roundup

gaming hard drive round upAll hard drives laid out in the roundup follow the most important standards listed above. They are all from prominent manufacturers who have high reputation in the HDD industry, and have decent warranty terms ranging from 2 years to 5 years.

During the process of our research and compilation of this guide we gave most of our focus and efforts to investigate enthusiast high-end hard drives because they are more expensive in price and are supposed to last for too long, therefore their case is more sensitive than mainstream hard drives’. That’s why you’ll see enriched elaborations and informative details once you click the View More Details button located on the bottom of the hard drive’s profile section.

As for mainstream hard drives in our roundup, they are not regarded bad drives, they are rather very good for their purposes. So don’t underestimate them. They are strong enough to handle your daily lightweight to medium-weight tasks. Even if you aim at using professional highly-sophisticated software applications, or playing high-end heavyweight games, they are good (although not as good as enthusiast drives) as long as this will not be your consistent habit.

Quick Overview on the Selected Items

For the sake of reference, the table below offers a quick overview on the hard drives we recommend as the best-in-class HDDs for all needs.

Best Desktop Hard Disk Drives (HDD)
Manufacturer Brand Name Class Available Capacities Price Range
Western Digital (WD) Performance Black Enthusiast 1TB, 2TB, 3TB, 4TB, 5TB, 6TB $74 to $287
Blue SSHD 4TB Mainstream 4TB only $159
Desktop Performance Mainstream 2TB, 4TB $176.99 to $249.95
Desktop Mainstream Mainstream 500GB, 1TB, 2TB, 3TB $44.49 to $79.99
Seagate Enterprise Capacity v4 Enthusiast 1TB, 2TB, 3TB, 4TB, 5TB, 6TB, 8TB $87.99 to $430.24
Desktop SSHD Mainstream 1TB, 2TB, 4TB $69.99 to $144.99
Desktop HDD Mainstream 500GB, 1TB, 2TB, 3TB, 4TB, 6TB $61.29 to $263.85
Toshiba X300 Desktop Enthusiast 4TB, 5TB, 6TB $134.99 to $234.99
P300 Desktop Mainstream 500GB, 1TB, 2TB, 3TB $49.99 to $100.99
A note on Hitachi/HGST Hard Drives

You will note that we have omitted Hitachi/HGST from our selection list, that’s because, even though its brand is one of the most highly-reputed in the HDD industry, it has stopped developing consumer-grade hard drives since WD acquired it in 2012. The latest efforts of HGST in this space is Deskstar 7K4000 HDD that was released in 2012 and comes in maximum capacity of 4TB. It was though a very good drive, but because it’s old (almost 4 years old as of now) we have discarded it from our list.

As for the enterprise-grade hard drives, HGST has developed the Ultrastar 7K300 for enterprise space before the acquisition of WD, then it changed to Ultrastar HE8 with Helium technology implemented. We didn’t pick that drive either because it did not perform so well against the high-end drives in our list.

How the Items are Ordered

We have ordered the hard drives in the roundup according to their reported performance. We’ll depend primarily on the benchmark numbers provided by

The two charts are about capacities ranging from 1TB to 6TB, there WD Black is king undoubtedly. But if you want the fastest mechanical hard drive ever in SATA III interface, it’s Seagate Enterprise Capacity v.5 8TB [ST8000NM0055]. We didn’t include it in our list because it is too huge in space for an individual to possess, unless they have their exceptional reasons to go for that formidable size.

How to choose the best HDD match for your needs

Choosing the best hard driveHere we present a few tips that will help you pick the most suited hard drive for your computing needs. That’s to assure the rectitude of the taken decision on the specific hard drive you’re interested in to buy.

  • Identify yourself and specify your needs. Are you an enthusiast or a power user that needs the strongest and most powerful hard drive to handle the consistently heavy workloads you put on it? Or do you often work on a resource-demanding applications, such as professional video editing software or high-end graphics/animation designer? Or maybe you often play top-notch video games that’s too hungry for every single bit of performance to run seamlessly? Or that you manage your company/home small server and needs a hard drive with a long endurance and extensive lifespan to last at least 5 years in tough situation? If this is your case, then you belong to the ENTHUSIAST class. This type of hard drives is usually used by individuals alongside with a solid-state drive (SSD) in a hybrid mode system for the peak performance. Otherwise, if you’re just an ordinary user who has mostly lightweight software applications to work with, such as MS office, web browsing, low-end video games, simple video editor and so on. Or that you need this hard drive primarily for archiving your old/rarely-used data, then the MAINSTREAM area is where you must look into.
  • Don’t go for a large capacity that you’ll never use. Just be true to yourself and don’t go after the hypes around large capacities. Always bear in mind that HDD technology keeps evolving, and the average technology lifespan is between 4-5 years until a newer one with major improvements/updates emerges. So gauge your needs and pick the right capacity that you believe it can serve you sufficiently for the next 4-5 years until you buy a newer and more improved drive.
  • Remember that you can always use an external storage device. If your main purpose from a hard drive is a long-term storage for your data (i.e. archiving/backing-up), think about storing them externally if you are comfortable with that. That way you’ll not be compelled to even replace your current small hard drive. Or if you are in need of a new one, it won’t seem inevitable to go for a huge capacity and pay more money, rather you can buy a small-capacity high-end hard drive (1TB or 2TB) that comes in a pleasant speed, and expand the storage capability with an external hard drive.

What’s better—SSD or HDD?

We have covered this topic in several posts on our website and manifested the pros and cons of adopting SSD technology, and we deduced that an SSD is an amazing storage device in all sense of the word and it’s indispensable for any high-end system that puts extreme performance on the top of priority list.

Although we’d speak briefly about this issue, we strongly recommend that you visit our Desktop SSD Guide for more expatiation and details.

General comparison between SSD and HDD

The chart below features a short comparison between SSD and HDD, with which you can realize why an SSD is superior in all aspects (except that of price and available capacity).

Attribute/Characteristic Solid State Drive Hard Disk Drive
Start-up time Almost instantaneous; no mechanical components to prepare. Disk spin-up may take several seconds.
Randon access time Typically under 100 ms Ranges from 2.9 (high end server drive) to 12 ms (laptop HDD)
Read latency time Generally low because the data can be read directly from any location. Much higher than SSDs
Data transfer rate In consumer products the maximum transfer rate typically ranges from about 100 MB/s to 600 MB/s, depending on the drive itself. Enterprise market offers devices with multi-gigabyte per second throughput. An enterprise HDD can transfer data at about 140 MB/s. In practice transfer speeds are many times lower due to constant seeking, as files are read from various locations or they are fragmented.
Noise (acoustic) Basically silent HDDs have moving parts (heads, actuator, and spindle motor) and make some sound.
Susceptibility to environmental factors No moving parts, very resistant to shock and vibration Heads floating above rapidly rotating paltters are susceptible to shock and vibration.
Reliability and lifetime SSDs have no mobing parts to fail mechanically. HDDs have moving parts, and are subject to potential mechanical failures from the resulting wear and tear.
Cost per capacity NAND flash SSDs have reached USD0.59 per GB. HDDs cost about USD0.05 per GB for 3.5-inch and $0.10 per GB for 2.5-inch drives.
Read/Write Less expensive SSDs typically have write speeds significantly lower than their read speeds. Higher performing SSDs have similar read and write speeds. HDDs generally have slightly lower write speeds than their read speeds.
Power Consumption High performance flash-based SSDs generally require half to a third of the power of HDDs. The lowest-power HDDs (1.8″ size) can use as little as 0.35 watts. 2.5″ drives typically use 2 to 5 watts. The highest-perfromance 3.5″ drives can use up to about 20 watts.

Performance Comparison Between HDD and SSD

Here we’ll compare WD Performance Black 6TB Hard Drive, which is the fastest consumer-grade high-end 6TB HDD available, and Samsung 850 Evo 2TB, which is currently the fastest mainstream SSD on the market.

We’ve deliberately chosen a mainstream SSD in this comparison to manifest how a low-end SSD can easily beat a high-end HDD in terms of performance.

Performance Comparison – HDD vs SSD
Test WD Black HDD Samsung 850 EVO SSD
2MB Seq. Read 214.53 MB/s 493.54 MB/s
2MB Seq. Write 214.91 MB/s 468.10 MB/s
2MB Ran. Read 78.34 MB/s 483.45 MB/s
2MB Ran. Write 107.05 MB/s 467.22 MB/s
4k Ran. Read [MB/s] 0.325 MB/s 40.18 MB/s
4k Ran. Write [MB/s] 0.811 MB/s 116.20 MB/s
4k Ran. Read [IOps] 83.21 IOps 10,287.13 IOps
4k Ran. Write [IOps] 207.61 IOps 29,748.15 IOps
4k Write Latency [Avg] 4.8 ms 0.0333 ms
4k Write [max] 1,248.19 ms 3.94 ms

As can be already observed, a mainstream SSD can easily beat the most powerful mechanical hard drive in all performance tests.

Ok, so SSD is great enough to attract every computer user, whether they are an enthusiast user or mainstream, but how can we work around the high price issue of SSD while take the full advantage of the huge capacity of HDD?

Solution: SSD-HDD Combination (SSHD)

The best option we always suggest to everyone who looks for a large capacity and a high performance is to combine SSD and HDD together in hybrid mode. That way you will leverage the power of both drives.

We strongly suggest that you don’t go below 250/256GB SSD capacity, and not less than 2TB hard drive capacity.

You can read more about this method in detail on this article.

FAQs on Desktop Internal Hard Drives

Here are the answers to some of the most common questions about using an internal desktop 3.5-inch hard drive and the best method to take the full advantages out of it.

What capacity suits best?

This is one of the most confusing issues to HDD buyers. That’s because when a user sees how big HDDs have become (up to 12TB) and that almost all modern applications and games need huge storage space, they become stuck at this point, particularly if this user is a regular/mainstream one that doesn’t need too much from a computer and doesn’t have many files to store, yet they need to improve the speed of their system by replacing the old hard drive.

If this is your case, I suggest you go buy a good 1TB hard drive if your work is very basic and you don’t have many movies or games to archive. If you feel this is not sufficient still, go for a 2TB hard drive instead then.

As for power users or users who have lots of data to store, a good 4TB hard drive is sufficient for the near future, unless you have tons of movies, games and large applications, or you have a home server, then a 6TB hard drive is a better choice.

Just gauge your needs well and contemplate on your future with the computer in hope that you figure out what exactly you want.

Single SSD or Multiple HDDs in RAID-0?

RAID-0 with three high-end hard disk drives can provide you almost the same sequential read speed as an SSD with a much larger storage capacity and all of that is for the same price of a single 1TB SSD, but a single SSD surpasses this method in write speed and random read/write speed.

Moreover, RAID-0 is risky, once a drive in the array fails, all the array will collapse consequently, and if you bear in mind that HDD operates mechanically, that means the average failure rate of 3 HDDs combined together is higher than that of just a single HDD.

Primarily for this reason we strongly dissuade you from having multiple hard drives in RAID-0. Rather you better use an SSD and HDD combined in hybrid mode as explained earlier.

What to Do with the Old Hard Drive?

Replacing the old hard drive doesn’t mean necessarily to dispose of it. If it’s still functioning well, even if slow, you can still leverage it for good by keeping it as an expansion storage device for archiving purpose.

How to combine SSD with HDD?

If you have decided to use an SSD with HDD to operate together as one unit, then try hybrid mode where you can store your frequently-used data on SSD, and the rest on HDD, by the management of a special software application that makes your way too easy.


Mechanical hard drives have maintained their popularity for decades since they were first available for consumers, and even though SSD poses a real threat to the glory of HDD, and is foreseen to prevail within just a few years from today, HDD now is still king and indispensable in modern systems.

Like any primitive technology, HDD underwent lots of failure issues and performance problems, but as the technology evolves, those issues have become history, and HDDs now are much more reliable and way faster than their old predecessors to the extent that you can be confident to entrust your sensitive data in a high-end HDD for years without worrying about their loss, but certainly and intuitively if you have another copy of them on another storage device for the sake of precaution.