Thanks everyone for all the replies!
So since I don't know what the underlying host OS or filesystem will be for the VPS I was planning on KISS. Very basic Debian install, single ext4 virtual drive and a /datastore in it.
Fighting bit rot is...
We're looking into hiring a VPS to have completely up to date offsite backups. Currently we're moving USB HDDs around but and we'll keep doing those to have airgapped backups but we'd like a more immediate restore option for the server rack...