ça vient de wikipedia:
wikipedia wrote:The main purpose of this protocol is to allow only the transfer of media files and associated metadata to and from portable devices, one transfer function, in or out, at a time. It does not support operations such as open, edit and modify. A workaround is to copy to the hosting system for these operations and then copy back.
Pas trop tout suivi, donc pas sûr que ça soit utile