In newer DL20 versions of MPALL, you may need to manually bypass checksum verification in the 2307 PRAM / Panic Mode:

Ensure the folder contains the necessary flash files for your drive. Look for files named similarly to: (Boot Node) FW07....bin (Firmware) 3. Configure the MPALL.ini File Open the MPALL_F1_...exe (the main tool). Click Settings -> Load . Choose the default.ini or create a new config file. Set Controller to PS2251-07 or PS2307 . Set Burner File ( .bn ) to your matching BN07 file. Set Firmware File ( .fw ) to your matching FW07 file. Under "Flash Type," you can often leave it on "Auto."

Phison MPtool is a factory-grade tool. If you select "Pre-format" or "Full Capacity" with incorrect settings, you will permanently convert your USB drive into a 0MB brick that no tool can detect. Always verify your controller ID before proceeding.