Why don't you buy a BD-ROM drive and burn around 50GB data to those? Then they have those drive cases that'll hold around 100 discs on a soft sleeve, easy to store, lightweight, but takes manual moving. But of you're prose is archival/backup, that's the way to go.

I've got stacks of DVD-ROM discs from almost 20 years ago that hold 4.7GB data each iirc and have flip phone pictures and video on just to not waste space on a backup hard drives that's not likely to fail. I do have a BD-ROM drive now but never cared to pull data from disc to HDD, then reburn multiple onto 1 or 2 BD discs. Would make sense to do it as it'll reset the preservation clock, be ~$100 drive, and last about 30 years.

You're looking for inexpensive, long term, low technical skill. And I give you a solution that doesn't require giving Sony money outside of royalties for blu ray tech.