At the moment a pair of massive 16TB external hard drives are ‘cheap’ on Amazon UK. Despite RRPs of over £400, you can get a base model for £245 or a slightly fancier box for £270. Either way, you’ll have a ton of storage space for savegames, video projects, game install directories, and other media.
My co-workers at Digital Foundry routinely scavenge these drives for their video production work, as capturing game footage and creating YouTube videos quickly causes standard hard drive sizes to fill up. You never want to be in a situation where you have to delete your old work to save the new, so having a high capacity backup like this is perfect.
WD is generally considered the leader in this area, although its main competitor Seagate is sometimes preferred. (For comparison, Seagate’s 16TB expansion drive sells for £289, but it’s sold out.) I’ve personally been using WD drives since the mid-2000s (gosh, I feel old ) and I’ve never experienced a dying disk on me, which is somewhat miraculous.
It is also possible to “unbox” these discs, that is to say to remove their outer shell to obtain the “white label” discs inside and to stick them directly in your desktop computer. Obviously you lose portability, but access times are somewhat reduced, which helps when viewing or copying files.
Either way, if you need 16TB of expansion, you probably don’t need me to tell you about it. These are solid records, it’s a good price, fine.