Because PID 1201 is strictly associated with FirstChip microcontrollers, standard formatting tools like Rufus or Windows Disk Management will fail. You must use the factory mass-production software.

The prevalence of VID FFFF PID 1201 highlights a significant phenomenon in the electronics industry: the democratization of hardware manufacturing. In the past, USB IDs were strictly controlled. Today, the market is flooded with inexpensive microcontrollers and breakout boards produced by anonymous manufacturers in Shenzhen and elsewhere. These producers often bypass the USB-IF registration process to save costs or because they are utilizing open-source reference designs that use default codes. As a result, when a user plugs in a cheap Arduino clone or a generic USB relay board, the operating system sees VID FFFF PID 1201. It identifies the hardware not as a specific brand, but as a generic member of a class of devices.

If FirstChip MpTools throws a "Can't open volume for direct access" error or refuses to see the drive entirely, the controller chip is locked out of its default instruction cycle.