I have a 4 TB external USB hard drive split in two equal partitions. One is dedicated to Time Machine backups and the other has full-disk disk-image backups mad

I have a 4 TB external USB hard drive split in two equal partitions. One is dedicated to Time Machine backups and the other has full-disk disk-image backups made by SuperDuper!. The partition with disk images on it also has installer files for programs that I can't redownload on a whim. Since I can only hold a few disk images on a 2 TB drive, I copy these disk images to a ProLiant MicroServer with a raidz3 (I've since heard this is a bad idea compared to mirror sets) to give me access to older backups in case my external drive dies. I also use Backblaze; it backs up everything on the iMac and the external drive. The laptop pretty much doesn't get backed up, but I don't have much state on there that can't be recreated with `brew install` and `git clone`. Dropbox syncs some things, but I use SyncThing for syncing large files between my iMac, MacBook, and Windows machine. I also use a second SyncThing shared folder to keep my 1Password vault in sync between my iMac and laptop.