if your DSP handle cannot copy file from u-disk to inside memory. you can do like this.
- MENU→SYSTEM SETUP→ Inner Format
- MENU→SYSTEM SETUP→ Wipe Cache
- Use usb cable connect dsp handle to computer.
a, press the key “OK+MODE”, don’t loose it.
b, Use usb cable connect dsp handle to computer.
Till the screen show like this:

Release the key.
C,then you will see there is a flash in the computer.

A0242740(i:): the dsp handle
Just use computer format it is ok, don’t worry the system parameters, it wouldn’t delete the parameters.