Mach Speed Technologies PERSONAL MEDIA PLAYER T4 - Manual (Page 10)

7. Once you have located the song files, you can right click on the song itself,
and select “copy”. Open the removable disk drive, right click on in the empty
space, and select Paste. This will transfer the song on to your player.
8. Repeat step 7 for as many songs as you want to copy on to the unit.
NOTE: MAC Computers
When connected to your MAC computer, the device will act as a removable
drive. Simply drag your files to the device.
Main Menu
This player uses a touch screen interface, with three buttons on the front of the
device, a +, a – and an M button. On different screens, these buttons will have
different functions, detailed in the appropriate sections.
Some common icons are shown below
Return icon- touching this icon will return you to the previous
screen.
Desktop icon- touching this icon will return you to the desktop