Beyonwiz FV-L1 - Manual (Page 107)

Advanced Setup
100
4) Format USB Storage
In order for the FV-L1 to be able to write files to a USB storage device,
the USB device must be formatted first. Select the “Format USB HDD”
menu with the OK button. A list of USB storage devices will be
displayed.
Use the UP/DOWN buttons to select the device you wish to format and
press the OK button.
WARNING
 If you format the USB storage device, all the data stored in the USB
storage device will be erased.
NOTE

It takes several minutes to format a USB HDD.

Even if the USB storage device is formatted with a PC, it should be re-
formatted with the FV-L1.
 If you only want to play media files from your USB storage device,
and you do not intend to copy or move media files from the FV-L1
onto your USB device, you do not need to format it with the FV-L1.