Question EG4 Firmware adapter issue

Recently purchased the Eg4 firmware adapter for programming my batteries.  Plugged in USB C cable to adapter and other end into a PC.  Tried copying a file over and was denied permission to write files to the adapter "drive".   Opened Disk manager on the PC and saw the drive as FAT.  Re-formatted the "drive" (As FAT) and now the drive doesn't show at all.  Tried different computers and different operating system.  Device "not recognized" under USB devices.  Does the adapter need to be re-imaged?  Is that something I can do - or am I returning this?