Usb Flash Drive - Phison MPALL v3.72 Firmware Guide - Scribd
You cannot delete files, format, or write anything. If diskpart fails to clear the read-only attribute, the controller is likely in a "Safe Mode" lock. MPALL can force a full erase. Phison Mpall V3.70.0e
This is common. The tool disconnects and re-enumerates the drive. Do not unplug it. Wait 60 seconds. If nothing happens: Usb Flash Drive - Phison MPALL v3