Size of disk usage versus dietpi-backup

There is probably a good reason for the difference, but it would be nice to know why :slight_smile:

DietPi v10.1.2 : 14:52 - Sun 02/22/26
 ─────────────────────────────────────────────────────
 - Device model : Native PC (x86_64)
 - Kernel : 6.12.73+deb13-amd64
 - CPU temp : 40 °C / 104 °F : Optimal temperature
 - LAN IP : xxx.xxx.xxx.xx (eth0)
 - Disk usage (RootFS) : 399G of 917G (46%)
 - Disk usage (userdata) : 399G of 917G (46%)
 - MOTD : DietPi v10.1 has been released. Check out all changes:
          https://dietpi.com/docs/releases/v10_1/
 ─────────────────────────────────────────────────────

So disk usage is almost 400GB.

But if I do a complet backup (dietpi-backup) it adds up to 427GB

Torben