Despite its name, gphoto2 is more than just a command to control a camera over USB. It also interfaces with MTP file systems, like the one you might run on your mobile device. Find out more in today's exciiiiiting episode.
$ gphoto2 --auto-detect $ gphoto2 --abilities $ gphoto2 --list-folders $ gphoto2 --upload-file ~/path/to/file --folder /folder_name/
shasum -a256=6491d7453c196cc7a89a9bb30fd7cb79db20262186d095d76919712a30492917