Like, should I be booting them up once every few months, keeping them plugged in, running any sort of database rebuilding program like Sony consoles have, or pulling the drives and using DiskFresh on them every few years? I'm assuming the manufacturers didn't really plan for longevity beyond the 5-6 year console cycle so I don't know if they'd be utilizing any of the built-in tools HDDs have and I'm trying to think of how to do any sort of HDD preventative maintenance on them.
If there's something on them you care about then make backups of that, otherwise who cares they are just standard interchangeable computer hardware