[3np]

Have you considered a distributed filesystem?

For example:

Glusterfs Replicated 3 (1 arbiter/parity), put on top of zfs filesystems with checksumming.

Users/consuming services can Fuse mount over the network

Incremental backups of bricks (1 should be enough) to a mirror or spinning rust

Then all you need to worry about is offsite

If you really only need to solve for gitea, this is prob overkill but if you have more services putting stuff on disk it could be worth it. Works great for me.