I'm getting closer to setting up a consistent backup plan, backing up to an external USB drive. I'm wondering about a reasonable filesystem to use, I think I want to stay in the ext2/3/4 family, and I'm wondering if there is any good reason to use anything beyond ext2?
(Some day I'll try ZFS or BTRFS for my "system" filesystems, but don't see any point (and don't want to learn) either of them at this point -- I don't see much need for a backup filesystem.) But, I'll listen to opinions ;-)