BenQ Joybee 125 - Manual (Page 74)

64 Using BenQ Joybee 125 MP3 Player
4. Press Start to start formatting Joybee 125.
5.Press Close to end task after format is completed.
You may format Joybee 125 from Windows. However, make sure that
you do not format it in FAT32 or NTFS format.