9. How can I access the storage/SD card after connecting the M15 to the computer?

M15 uses the MTP protocol and couldn't be properly recognized until the MTP driver installed.

Connect M15 to computer,

For Windows computers, 

open the disk named "FiiO MTP Driver";

Then, copy the "SAMSUNG_USB_Driver_for_Mobile_Phones_1590.exe" file

in the folder "Windows" to a local folder on the computer (such as the desktop) and double click to install it;

Instruction of installing the  MTP driver on Windows: click here to check

For Mac comuters,  

double click the folder "NO NAME" emerged on the desktop.

Copy the "Android File Transfer.dmg" file under the "MAC OS MTP Client" sub-folder to the desktop and run it. After that, you'll be able to access the storage or SD card of the M15.

Instruction of installing the  MTP driver on Mac: click here to check