Well, a 256GB of storage in flash drive form can be obtained for $31 or less. So it is very possible to slowly save a copy of your data from the most important to the least. (Or to move 256GB of your least important data off at a time). The data curation community is a great resource for figuring out how to organize things to keep found things found

Rookie numbers.

Try that shit on datahoarders and see hoards measured in Petabytes