I set Simple Backup Suite to back up to a 1 TB drive on my other computer. However, the drive no longer mounts when the machine boots up, so it wasn’t making backups for months, with no warning or error messages of any kind.
So then I set it up to back up to another drive with a FAT filesystem. I checked after a few weeks and it had a bunch of folders of backups. Great, it’s working!
Except not really. Since it backs up everything to a single .tgz file, and FAT filesystems can only accept a maximum file size of 4.0 GiB, it’s been silently halting and leaving corrupt, useless backup files. Smooth.