You'll need to be an Amazon Prime member to take advantage of Prime Day deals. You can sign up for a free trial, which will see you through Prime Day and which you can cancel after 30 days, or if you like the look of Prime then right now you can save £20 on a one-year subscription.
There are some fantastic savings on storage for Amazon Prime Day, including enormous discounts on WD hard drives.
Whether you're looking for a portable hard drive to pair with your PS4, or a vast desktop hard drive to back up your entire digital life, there's a great deal for you this Prime Day.
The deals on WD's My Book Duo hard drives are particularly impressive, slashing hundreds of pounds off drives up to 20TB in size.
These drives are built to enterprise specifications, with a great balance of durability and performance, so you know your data is in safe hands.
WD 8TB My Cloud EX2 Hard Drive: £385.87 £333.52 at Amazon
Amazon has knocked over £50 off this WD My Cloud hard drive, designed to serve as your own personal media server. It supports Windows PCs, consoles, connected TVs and Blu-ray players, and allows you to save, access and stream your media from anywhere using the My Cloud mobile app.
WD 4TB My Passport Hard Drive: £84.99 £75 at Currys
Currys has released some cheeky deals to compete with Amazon Prime Day, including a nice discount on this excellent portable 4TB hard drive. It feature hardware encryption, and comes with WD's own backup software. It'd also be a great choice for PS4 owners looking for great value storage.
WD 20TB My Book Hard Drive: £626.39 £333.99 at Amazon
This is an incredible amount of storage for the price. Amazon has knocked £292 off this colossal 2TB two-bay desktop hard drive for Prime Day. Its pair of WD Red drives deliver up to 360 MB/s2 sequential read speeds, and it features USB-C connectivity for universal compatibility.
WD 16TB My Book Hard Drive: £498.99 £286.99 at Amazon
If you don't need quite so much space, Amazon has also slashed the price of this slightly smaller 16TB WD desktop hard drive. For Prime Day, there's over £200 off this super-fast RAID-optimised HDD. Like the 20TB model, it features WD's super durable Red drives, which are built to enterprise standards.
Can't see what you're looking for? Here's a round up of the best prices for some of our other favorite external hard drives...
- TechRadar is scouring Amazon and all the major retailers' websites to round up all the top deals on Amazon Prime Day - and we’ve put all the best Prime Day deals in one simple-to-use place to help you find the offers that will really matter to you.
Get the best Black Friday deals direct to your inbox, plus news, reviews, and more.
Sign up to be the first to know about unmissable Black Friday deals on top tech, plus get all your favorite TechRadar content.
Cat is TechRadar's Homes Editor specializing in kitchen appliances and smart home technology. She's been a tech journalist for 15 years, and is here to help you choose the right devices for your home and do more with them. When not working she's a keen home baker, and makes a pretty mean macaron.