Ps3111sb Firmware Upgrade Tool
The most reliable method for an "unresponsive" drive involves putting the controller into a "Safe Mode" or "ROM Mode". Open the SSD casing to access the internal PCB. Locate the two-pin service jumper or pads.
Download a utility like phison_flash_id (developed by hardware enthusiast vlo). Running this tool while the drive is connected will read the controller configuration and output the exact NAND flash type inside your SSD. ps3111sb firmware upgrade tool