Compare the Best External Hard DrivesAugust 2019

External hard drives are portable and used to backup files and data from your computer, so they’re safeguarded in case of accident or for retrieval at a later date. While Cloud-based backups are being used more and more for backups, external hard drives still have several important benefits compared to online backups:

Capacity

The main important consideration when choosing an external hard drive is the capacity. This Is a measure of how much data the drive can hold, and is measured in gigabytes (Gb) or terrabytes (Tb) . A gigabyte is 1000 megabytes, and a terabyte is 1000 gigabytes. Our drives range from relatively small portable 120gig drives to enormous 5Tb drives, which can safely hold all the data from multiple machines at once. Generally speaking the higher the capacity the better, but it does depend on what you’re going to be backing up. If you only use your computer to store documents, low-res photos and the like, a 2-500 gig drive should be enough. On the other hand, large capacity drives are useful for storing RAW photos, video editing or Photoshop files.

Size & Portability

Hand in hand with the capacity of the drive is its size. Generally speaking, the larger the capacity of a drive, the bigger it is. Small-capacity drives are extremely portable, being no larger than a mobile phone, so can be transported very easily. On the other end of the scale, the very large capacity drives are not meant to be portable, and usually sit in or under your desk as a safe deposit for all your data. Portability and weight will only become a real issue when choosing the very high-capacity drives, but it is worth paying attention to if you plan on transporting the drive frequently.

Read/Write Speeds

Read & write speeds measure how quickly data can be written from & to the external hard drive. This is measures in bytes per second - the higher the speed, the faster large files (such as movies) will be transferred onto or from the drive. The read-write speeds are also affected by the USB version supported - USB 3.0 supported drives allow far higher transfer rates than USB 2 drives, so it is worth seeking out the newest drive you can for the fastest data transfer speeds.

Power

On the subject of USBs, external hard drives are powered by 2 main methods: via USB or externally power lead. Smaller drives will be powered via USB - this means that the same lead that transfers the data also powers the device. This means no battery, no extra leads, and they are far more portable. Larger drives may be so big and powerful that USB alone can’t provide enough power - in which case they may need an external power connection to properly function. This means that extra consideration has to be made for a spare power socket and the required leads - making them less use when on the go.

Extras

Finally, there are a wealth of extras that can be found in more advanced models of external hard drives. Some of these may only be useful in specific situations, and you will usually pay more for them, but the utility may well be worth the extra cost. Some examples of extra features include:

External Hard Drive Prices

External hard drives range in price from £29 to £783 and in total we found prices for 361 external hard drives. A new external hard drive costs on average £137 and 80% of external harddisk are priced between £45 and £293. The Toshiba Canvio Basics - 500Gb is the cheapest external hard drive at only £30, and ioSafe SoloPRO - 4Tb is the most expensive at £783.

External Hard Drive Brands - Price Range

IoSafe external hard drives range in price from £335 to £783, and the average price of ioSafe external hard drives is £482 which is the highest average price of all external hard drive brands.

The second highest average external hard drive price out of all brands is iStorage external hard drives with an average price of £285. iStorage external hard drives range in price from £118 to £506.

G-Technology external harddisk range in price from £56 to £751, and the third highest average external hard drive price out of all brands is G-Technology external harddisk with an average price of £277.

External Hard Drive Brands - Average Ratings

We have analysed 265 expert reviews and 1,652 user reviews for external hard disk and used this information to determine the average rating for each brand of external hard drive. The top rated external hard drive brand is Western Digital with an average rating of 87%. The second best brand is Seagate with 76% and the third best brand is Buffalo with 75%.

Biggest External Hard Drive Retailers

The biggest external hard drive retailer by number of products currently for sale is Amazon UK. We found 186 current external hard drive offers from Amazon UK. The second biggest retailer is Ebuyer Business with 68 offers. That means Amazon UK is more than twice as big as Ebuyer Business when it comes to external harddisks. Ebuyer is the third biggest retailer with 50 current offers.

When Are Most New External Hard Disk Drive Released?

Most new external hard drives tend to be released between June and July. That means that most of the latest external hard drive technology was released in within the last 3 months, and now is good time to buy. In 2018 most new external hard drives were released in June, with 59 new external hard drives released that month. July was the biggest month in 2017 for new external harddisk, with 36 new external harddisk released that month. In October 2016, 42 new external harddisks were released making it the biggest month that year for new external hard drive releases.

How Fast Do External Hard Drive Prices Drop After Release?

On average external hard drives drop in price by 1% in the first 6 months after release.

If you are prepared to wait then you could save an average of £1 on a typical £137 new external hard drive by waiting 6 months before buying.

Weights

'Weight' denotes the weight of the external hard drive, measured in grams (g).

Comparing all external hard disk drives, the weights range from 41g to 11.4kg. The weights of most external hard drive range from 0g to 300g. The ioSafe SoloPRO - 4Tb, which is priced at £782.56, has the heaviest weight and is a 6.8kg external hard drive. The Integral USB 3.0 Portable SSD External Hard Drive - 256GB, which sells for £108.99, has the lightest weight and is a 41g external hard drive.

USB Powered

Whether the hard drive is powered by USB or not.

The vast majority of the 848 new external hard disks currently listed on Kagoo are USB powered external hard drive. 678 external hard disks out of 848 are USB powered external hard drive.

Hard Drive Capacities

'Hard Drive Capacity' denotes how much data the hard drive can hold, measured in gigabytes (GB).

Comparing all external hard disks, the hard drive capacities range from 1GB to 64TB. The hard drive capacities of the majority of external hard disks range from 0GB to 1.5TB. The Western Digital My Book Duo - 20Tb, which is available at £602.87, has the biggest hard drive capacity and is a 20TB external hard drive. The external hard drive with the smallest hard drive capacity is the Western Digital WD My Passport Wireless - 2TB, which is a 1GB external hard drive and currently retails for £399.00.

Which Are the Cheapest Retailers for External Harddisk?

The chart below helps you decide which retailer is normally cheapest for buying external hard drive. For each retailer it shows the total number of external hard drive where they currently have a market leading price. The chart below helps you decide which retailer is normally cheapest for buying external hard drive. For each retailer we took all of their prices and looked at what proportion of those prices where the cheapest on the market. The cheapest retailer that we found was Amazon UK. 119 of their external hard drive prices were the cheapest that could be found anywhere.

Proportion of External Hard Drives for Which Each Retailer is Cheapest?

Assessing how cheap each retailer is for external hard disk by counting the number of cheapest prices for that retailer, makes the retailers that offer the greatest number of external hard drive prices more likely to offer the greatest number of cheapest prices. The chart below considers the proportion of each retailer's external hard drive prices that are the cheapest compared to other retailers. The cheapest retailer that we found using this approach was Amazon UK. 64% of their external hard drive prices were the cheapest that could be found anywhere.