Error: Bad Block at 0x00004F.
Run MPTool.exe . Click Setting (or the gear icon, password often blank or 12345 or 320 ). Click Load from File and select the default .ini config provided.
Document version: 1.0 Last updated: April 2026 Target tool: FirstChip ChipYC2019 MP Tool (build 2019.xxx)
: Scans the NAND for bad blocks and builds a new Flash Translation Layer (FTL) while mapping out unusable areas.
: Resets the controller firmware to factory settings, identifies and maps out bad memory blocks, and restores the drive's original (or true) storage capacity.
This process will permanently erase all data on the USB drive. 1. Download the Tool
You must verify that your USB stick contains a FirstChip chipYC2019 controller. Attempting to flash your device with tools intended for Alcor, Phison, or Silicon Motion controllers will permanently brick your device.
Before doing anything, you must confirm that your USB drive uses a FirstChip chipYC2019 controller. Use a free tool like ChipGenius (芯片精灵). This tool will scan your USB ports and provide detailed information. Look for the lines Controller Vendor: FirstChip and Controller Part-Number: chipYC2019 . This verification is essential because using the wrong tool can permanently damage your drive.
The "ChipYC2019" is often found in budget to mid-range flash drives. However, like all complex controllers, it can suffer from logical corruption, bad block accumulation, or firmware crashes. This is where the enters the scene.