Phison | Ps2251-07-ps2307- Mptool
Reflashing a Phison controller is a technical process typically handled through Phison MPALL (Mass Production After-Layer Launching) or Phison ST-Tool Identification : Use a tool like ChipGenius to confirm the exact VID (13FE) PID (5500) , and controller version (PS2251-07).
If your flash drive uses the (often labeled as PS2307) controller, all is not lost. In fact, it is one of the most recoverable controllers on the market—provided you have the right tool. phison ps2251-07-ps2307- mptool