Hi @tuton
You see an increase in disk space due to the way your hosting provider computes it, but you are not actually using more disk space. The directories in /srv/jail/user/home/user/ are bind mounts to /home/user/, similar to a symbolic link, so they do not take up additional space.
No, you shouldn’t delete anything. If you want to disable the jail, execute these commands as root:
/usr/local/hestia/bin/v-delete-sys-sftp-jail
find /srv/jail/ -mindepth 1 -maxdepth 1 -type d | awk -F '/' '{print $NF}' | xargs -I {} /usr/local/hestia/bin/v-delete-user-sftp-jail {}
No, as I said above, it’s a bind mount so it is not using more disk space.
Chroot for SFTP isolates users into a specific directory, providing enhanced security by preventing access to the rest of the filesystem.
If you don’t want it, just disable it.