If your USB flash drive has stopped working, become write-protected for no reason, or is showing the wrong capacity, you've likely already searched for a solution and come across the term "MP Tool." Mass Production tools are powerful, low-level utilities used by manufacturers to initialize and configure USB controllers. For the very common Phison PS2251-07 (also known as PS2307) controller, finding the right tool and version is a critical first step.
The Phison PS2251-07 (PS2307) Firmware page on USBDev is the best source. It offers a variety of BIN and FW files, along with MPALL tools suitable for flashing them. phison ps225107ps2307 mptool link
