What should I do if I removed or format the System files of MUS-2500 accidentally? 1. There should be a Smart drive and Smartsys drive once you plug in MUS-2500. 2. The Smart drive file can not be deleted, the Smartsys drive can be deleted or format. 3. In case you lost the file on Smartssy drive, please enter the Smart drive –> Recovery folder --> Click on Recovery.exe 4. Click on Restore SmartUSB Utility. 5. Recovering. 6. Recovered.