@Qybat@batchats.net Some JPEGs I'm processing go from 2.3MiB to 40KiB (blank pages are dumb, or mostly-blank with tiny logo centred on them).
Do you have 50TiB handy?
… it's … uh … a rather substantial collection. But at least I have gigabit fibre, so it shouldn't take /too/ long. (It'll take too long. Exercising offsite backup restores can take a week or two, and there are things like a copy of Wikipedia, every Popular Mechanics, Encyclopedia Brittanica, Project Gutenberg, &c. in here. Plus multimedia…)