Okay, a real computer question.

[Fritz]

flash drives are unreliable for long term storage.

you could also look at this WD Blue 2TB.  I have 2 for my server.  They have been quite co-operatve.

[jdcjdc]

Jeez, I just noticed the Seagate 1 TB is $64.82 and the 2TB is $64.99.

and 5TB is $110. or 26 TB is $250... $10 per TB.

Get rid of everything and simplify to 1 backup drive.

[Ca Bob]

Here is a really naive answer, but I have used it. Just call OWC and ask whoever answers the phone. I've been using the two drive -- drive dock with a couple of Toshiba hard drives -- this so I can keep separate duplicate copies of some files. Not very fast, but you get a lot of cheap storage in an old format.

Here is another possible complication: Make 2 backups and save one in a safety deposit box. One colleague does exactly that, and one of his backups was available to him in the surviving bank vault after the Pacific Palisades fire. At the locations that suffered through the fire, there wasn't even a refrigerator or a washer-dryer left intact, just dust and fireplaces and rubble. You could recognize what used to be washers and dryers, but nothing at all heat susceptible would have survived. Note: There is an old myth that has even been promulgated by the Red Cross to the effect that you should make copies of important documents, seal them in a heavy ziplock bag, and put it in the bottom of your freezer. The idea is that this is the best place for documents to survive a fire. This may be the case for a brief, contained house fire, but for a real, sustained fire like in the Palisades, where thousands of structures burned non-stop, it doesn't work. I don't object to the idea of saving things in a freezer, but bank vaults seem like a tougher alternative.

[Garaboncias]

flash drives are unreliable for long term storage.

you could also look at this WD Blue 2TB.  I have 2 for my server.  They have been quite co-operatve.

WD Blue drives are unreliable for storage.