The choice of file system matters quite a lot when it comes to storing data, especially when you're working with a lot of it. Your typical network-attached storage (NAS) may use EXT4 or BTRFS, and ...

No dice though trying to do the root FS (and thus all child FS at once as well). Trying to back it up to a child FS on the remote system doesn't work, and neither does attempting -F, which seems to ...