I installed apt-btrfs-snapshot
Then everytime I added or removed something with aptitude it created a new snapshot... so I had hundreds of snapshots.
I wrote deleted all the snapshots, cause everything was fine... and I did not delete the root "@" snapshot.
But after doing that, my disk volume shows all the space is still in use, however all my files are gone!!!!
Is there any way to get access to my files again without restoring everything from a backup?