Hi, my RS-97 is new V2.1. I installed the custom firmware using the internal micro SD card. I flashed the card with Firmware_v1.5_JZ4760B. I extended FAT32. The OS loaded but when I try to connect the usb to PC to add roms, it says "this device does not support usb mount". I am wondering how to add roms? Is there anyway I can add roms through usb? Or do I have to add roms connecting the micro sd direct to PC under rom folder? I searched online but no luck. Could you kindly help? Thanks in advance.