Too high disk storage usage question

[apparatus]

Lv of a qube takes more space than filesystem on it

The Qubes OS is storing 1 old revision of the all volumes, so when you’ve restarted vault qube a few times the old revision which still had the raw image was removed and replaced with the one where you’ve removed the raw image. Not sure how LVM works, but I guess it’s not the real space that vault volume consumes but just the maximum to which it was expanded.