here is the setting that you are required to set if you are not use the external card reader to transfer the iso games file.
1. Press the "Start" button to call the M33 VSH Menu. You will see the following screen:
2. Take a look on the circule point, the original setting is "Flash 0"3. change the setting to "Memory Stick" as follow:
4. That's all! reboot the device and re-connect the usb, you will able to read the whole data in the memory stick.