

If you’re using the AIO image, backup/restore can handled for you, so no need to worry about the manual steps involved. Or if you’re using a VM, a backup can take the form of full system snapshots, so also no need to understand how data are stored. Granted it’s always helpful to know what your running, but not necessarily requisite, even for backups.
Where are you running
du -sh *
? (I.e. what directory, are you definitely scanning the whole file system?) I’m sure it’s obvious, but can never hurt to check!What does
du -sh /
show? (Generally, the*
glob pattern in the shell will not match hidden dot-files, so is it possible they are being excluded?)