MOUNT FOLDER SHARED WITH THE HOST # data folder on the host machine /mnt/raiddisk/nextcloud chown www-data:www-data nextcloud # in lxc container configuration file /etc/pve/lxc/<lxc_id>.conf mp0: /mnt/raiddisk/nextcloud,mp=var/lib/docker/volumes,replicate=0 lxc.idmap: u 1 100000 32 lxc.idmap: g 1 100000 32 lxc.idmap: u 0 33 1 lxc.idmap: g 0 33 1 lxc.idmap: u 34 100034 65502 lxc.idmap: g 34 100034 65502 POST INSTALL COMMANDS docker compose exec --user www-data nextcloud php occ config:system:set default_phone_region --value="IT" lxc.idmap: u 0 100000 1 lxc.idmap: g 0 100000 1 lxc.idmap: u 1 33 1 lxc.idmap: g 1 33 1 lxc.idmap: u 2 100002 65533 lxc.idmap: g 2 100002 65533