Ok I understand.
Perfect, could advise me on how to move a container from a storage pool to another ? I found this procedure, is it right ?
lxc stop container_name
lxc move container_name temp_container_name -s new_storage_pool
lxc move temp_container_name container_name
lxc start container_name
Why not simply
lxc stop container_name
lxc move container_name container_name -s new_storage_pool
lxc start container_name
Ref: How to move containers to a new storage pool on the same host
By the way, is there a safer way to move it ? I mean (stopping it then copying it and finally removing it). This way if something failed I can restart the old one and there will be no problem.