Usb Flash Drive - Phison MPALL v3.72 Firmware Guide - Scribd
For those attempting a repair, it is often necessary to put the drive into "Test Mode" (shorting specific pins on the controller) to make it visible to the software if it is not detected normally. Phison Mpall V3.70.0e
Red “FAIL.” Usually means wrong firmware, bad flash chip, or incompatible controller. Usb Flash Drive - Phison MPALL v3