If a USB memory was formatted on the V-STAGE prior to System Program version 1.02, it is possible that no ROLAND > SOUND folder was created automatically.
In System Program version 1.02 (or later), the ROLAND > SOUND folder is created automatically.
You can do one of the following:
a. Manually create a "SOUND" folder inside the "ROLAND" folder.
b. Perform the System Program update to version 1.02 (or later), and then re-format the USB memory on the V-STAGE.