When your phone connects to a PC, a pop up window will appear to ask you which mode you want to use.
To transfer data between the device and computer, select “Transfer files” mode.
To transfer photos or files if MTP is not supported (PTP), select “Transfer photos (PTP)”.
To disable all data and file transfer connections with the computer and put device in charging only mode, select “Charge this device”.
Computers that use Windows XP might not connect properly, because they don’t have the proper drivers installed by default. To fix this, download and install Windows Media Player 11 or higher which contains the proper drivers.
Computers that use Mac OS X 10.5 or later might not connect properly, because they don’t have the proper drivers installed by default. To fix this, download and install Android File Transfer which contains the proper drivers.
When your phone connects to the device that support USB charging via OTG cable, you can select “Supply power” mode to charge the connected device.