External Hard Drive Buying Guide 2017

Gone are the times when one suffered from low definition multimedia content; thanks to high-quality audio and video recorders, as well as powerful computers that can process them efficiently, more and higher definition multimedia content are becoming available online. This means that we need more memory, to store the same length movie or 100 photos than before. Unfortunately, many computers are equipped with a meager 1TB of disk space, some of which is already taken up by the operating system. Apart from that, computers are still far from perfect and will often fail at the most inconvenient times – it always helps to have a backup of all your most important files.

Maybe you have just returned from fantastic holidays with a ton of pictures and videos, now you’re heading to your friends/family to show them how was it like. This task would be too much to handle for many USB flash drives, but with a decent external hard drive, you shouldn’t worry about a thing. Love gaming, but always run short with consoles storage capacity? External hard drive is the easiest way to upgrade your storage.

This article shall explain the fundamentals as well as the aspects of external hard drives you should consider closely. It will be useful when planning a purchase so that one can find the best external hard drive, whether for backups, file transfers, or just additional space.

SSD vs. HDD – Which is Better
ssd vs hdd

Whether or not solid-state drives (SSDs) are better in all technical aspects compared to hard disk drives (HDDs) is a long-standing debate. This section, however, does not attempt at resolving this issue. Rather, it aims to help you make an informed decision.


The biggest difference between SSDs and HDDs lies on how data is read or written. HDDs contain a read/write head attached to an arm that reads data from platters spinning typically at 5400 rpm or 7200 rpm whereas SSDs, on the other hand, contain interconnected flash memory chips (like the ones you’d see in USB Flash Drives). To put things simply, SSDs do not have to move parts around to get to your data, which makes data access much faster and reliable.

This, however, means that you are going to have to shell out more cash for a lower-capacity SSD. If you have a bit more money to spend, then definitely go for an SSD external drive. Otherwise, it is perfectly fine to go with HDD, especially if you are not too concerned about performance.

What for do you need an external hard drive?

external hdd purposeYou can use an external hard drive for many things. I’ll just name few of them – backing up files, additional storage space, organizing media files, locking up important files, for professional work usage and some extra storage when gaming on consoles like Xbox or PlayStation. Before getting your external HDD, you should clearly know it’s purpose. Of course, you can do most those things on any external hard drive. However, there are exceptions.

  • Will you carry your external hard drive around? This is one of the most important questions. There are two types of external HDDs – Portable and Desktop. Moving Desktop external hard drive around might not be so easy, considering it has much greater dimensions and an additional power cable. If your always on the go, consider getting a rugged external hard drive – it will provide a much higher durability. (Check out our article about Best Rugged Portable External Hard Drives )
  • Many people look for a durable external hard drive for their work. In this case, it’s all about performance and reliability. Check out our article about Best Portable Hard Drive for Photographer.
  • Are you a passionate gamer? If so choose external hard drives with at least 2TB memory, make sure that external hard drive is backward compatible with USB 2.0. Otherwise, it won’t work with some consoles. For a detailed review check out our Top 9 – Best Xbox One External Hard Drives or if you use SonyPlaystation – PS4 External Hard Drive Buying Guide. All external hard drives in these articles are fully compatible with consoles and are best picks for gaming.
Interfaceesata vs thunderbolt vs ubs 3.0

Interface, in this context, means the communication between the computer and the external hard drive. To date, there are four types of interfaces for external hard drives. The three types of USB interfaces are USB 1.0, 2.0, and 3.0. USB 1.0 is obsolete and is no longer present in most modern computers; therefore most people end up with USB 2.0 and/or USB 3.0 ports. The USB 2.0 ports have a theoretical maximum of 480 megabits/sec whereas USB 3.0 has a theoretical maximum of 5 gigabits/sec.

This means that USB 3.0 ports allow more data to flow in at a time. In most cases, it is best to purchase an external hard drive that would work with USB 3.0 ports even if your computer may only have USB 2.0 ports, as it allows much faster read/write speeds should you choose to upgrade your computer.

A few years ago, Thunderbolt ports were exclusive to Apple computers. Thunderbolt ports have a theoretical maximum of 20 gigabits/sec (10 gigabits on each channel, two of which available), which is four times the speed of USB 3.0! If you can afford to spend a bit more, opt for an SSD with a Thunderbolt connection (assuming, of course, that your computer has a Thunderbolt port).

You might have heard of the eSATA interface, but this interface isn’t much faster than the USB 3.0 interface. In addition, it requires an extra USB cable or AC adapter for power, along with an eSATA port, which a lot of computers no longer have.

Drive Speed

If you’re going for a hard disk drive, you’re most likely going to be faced with two options regarding speed: 7,200rpm and 5,400rpm. The 5,400rpm is the speed most internal hard drives have; often 7,200 rpm hard drives are offered to people who want a little more speed. Take note, however that the difference in speed will only be apparent if you go for at least a USB 3.0 interface. If you’re stuck with USB 2.0 or other slower options, then you may be better off investing in a larger capacity 5,400rpm hard drive.

Also, take note that hard drives that have moving parts are subject to wear-and-tear, which means that 7,200rpm hard drives, because of having to spin faster than their 5,400rpm counterpart, will have a shorter lifespan. In short, if you have at least a USB 3.0 port and are prepared to sacrifice lifespan for performance, then go with a 7,200rpm external hard drive. Otherwise, go for a 5,400rpm external hard drive.

If you’re going for a solid-state drive, then you’re most likely going to be faced with two options as well: MLC flash and SLC flash. Multi-level cell (MLC) memory is the most common type of flash memory often found in smartphones, cameras, USB flash drives, and other gadgets. MLC flash memory is cheap, but it easily wears out and has a slower write speed compared to single-level cell (SLC) memory. SLC has a much faster write speed and is more reliable. Obviously, SLC memory will be much more expensive though. For most applications, you should be perfectly fine with MLC flash memory.

Capacityhow much storage does external hdd need

Typically, external hard disk drive capacities range from 300 GB to a whopping 8TB. For simple Word and Excel documents, a 300 GB external hard drive will suffice. For high definition multimedia content like Blu-ray movies, however, you’re going to want to consider going for a 2tb and above external hard drive. Bigger is always better, but since we’re looking for the best value for money, then go for one that at least gives you enough space for a little more files than you predict you need to store.

Extra Features

While most external hard disk drives available do nothing more than what your internal hard disk drives do, which is to store and retrieve files, there are actually some products available that provide automatic backup with a press of a button, as well as other nifty security features. These features, however, will cost you a bit more. If you’re willing to spend more for convenience, then you may find these features well worth the money. Otherwise, you may simply opt to manually backup your files yourself.

Converting an Internal Hard Drive into an External Hard drive
create external hdd - internal drive dock

Some people pull out the hard drives from their old computers and place them inside an external USB hard drive enclosure. These enclosures often cost less than $10 and are rather easy to install. The problem with this approach, is that internal hard drives aren’t meant to be moved often compared to external hard drives.

Frequently external hard drives will have procedures set in place for handling random drops and shocks. Physically, external hard drives are also more equipped in handling vibrations and bumps. In short, it’s best to invest in an external hard drive instead of an enclosure.






There are plenty of factors to consider when purchasing an external hard drive. One does not simply rush off to a computer store and purchase the best-looking hard drive available. While buying the most expensive external hard drive available may give a sense of assurance in terms of quality, some people find some products to quite overkill for their computers. For example, some people have purchased hard drives with a USB 3.0 interface, only to find out that their computers only have USB 2.0 ports and therefore will not be able to take advantage of the newer interface on their external hard disk drives.

Technically, an overpowered hard disk drive isn’t a problem for the computer. It is, however, a problem for one’s pockets. If, for example, you predict that you won’t be able to fill up a 1tb hard disk drive, then instead of splurging money on a 4tb model, focus on finding the best 1tb external hard drive with useful backup features and a rugged design that can withstand more bumps than others can.

In the end, your budget will dictate what hard drive you buy, so strive to find a balance between a product you can afford and a product you’ll be happy with in the long run.

About The Author
The guy who loves to understand how things work and explain them to others. Always staying up to date on newest technologies and providing you with all the information you need to know.

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