The Phison PS2251-07 (also known as PS2307) is a high-performance USB 3.0-to-Flash micro-controller commonly found in popular flash drives from brands like Kingston and Lexar. When these drives become "unrecognized," "write-protected," or show a "no media" error, they can often be revived using a Mass Production Tool (MPTool) like Phison MPALL or ST-Tool . Understanding the PS2251-07 (PS2307) Controller
Steps:
Benefits of Using MPTool
Warning: This process will erase all data on the drive. If the drive is not detected at all, you may need to manually enter "Test Mode" by shorting specific NAND pins—a risky move that requires opening the casing. Phison Electronics - USBDev.ru phison ps225107ps2307 mptool
This is the most interesting (and nerve-wracking) part. If MPTool doesn’t see your drive (even after "Load Driver" in Windows), you need hardware mode. The Phison PS2251-07 (also known as PS2307) is
Test Mode Procedure: You must physically short the data pins (usually pins 29-30 or 30-31) on the NAND flash chip with a needle while plugging it in. If the drive is not detected at all,