Fiio M21 - How to Access the Storage;Sd Card after Connecting the M21 to a Computer; How to Upgrade the M21

7
2. How to access the storage/SD card after
connecting the M21 to a computer?
For Windows computers, it is driver-free. After connecting the M21 to the
computer by the included USB cable, the driver will be automatically installed.
Then the FIIO M21 disk can be directly seen on the computer.
【Mac computers need a driver】
1. Visit FIIO's official website https://www.fiio.com/Driver_Download to
download the "Android File Transfer.dmg", and drag the file to the desktop of
the computer.
2. Double-click to open Android File Transfer.dmg, then hold the application icon
for Android File Transfer and drag it onto Applications. Release the icon to drop
it. Wait for the copying to finish.
3. Use a USB data cable to connect the M21 to the Mac computer.
4. Enter “Applications”, and double click the “Android File Transfer”. Then you
can manage the files stored in the internal storage of the M21 or the micro SD
card.
Notes: The M21 folder will directly pop up the next time it is connected to the
same computer.
3. How to upgrade the M21?
The M21 supports online upgrade and local upgrade.
1) Online upgrade