Lenovo P2 User Manual page 6

displays a notification such as "Connected as a media device". You can tap the notification,
and then select one of the following options:
Media device (MTP): Select this mode if you want to transfer any files between your phone
and the computer.
Camera (PTP) : Select this mode if you want to transfer only photos and videos between
your phone and the computer.
MIDI : Select this mode if you want MIDI -enabled applications on your phone to work with
MIDI software on the computer.
Charge only: Select this mode if you want to charge your phone only.