Rigol MSO4000 User Manual page 273

16 Troubleshooting
9. The USB storage device can not be recognized:
(1) Check whether the USB storage device can work normally.
(2) Make sure that the USB storage device being used is flash storage type.
This oscilloscope does not support hardware storage type.
(3) Make sure whether the capacity of the USB storage device is too large. It is
recommended that the capacity of the USB storage device being used with
this oscilloscope is no larger than 8 GBytes.
(4) Restart the instrument and then insert the USB storage device to check it.
(5) If the USB storage device still can not be used normally, please contact
RIGOL.
MSO4000/DS4000 User's Guide
RIGOL
16-3