If you are dealing with a "write-protected" or unrecognized USB drive based on the controller, a standard Windows format often isn't enough. You likely need a specialized "Mass Production Tool" (MPTool) to perform a low-level format and re-flash the controller firmware. What is the SM3257ENAA Low Level Format Tool?
A legitimate SM3257ENAA_Low_Level_Format_v20047.zip or .rar file from 2021 typically contains: sm3257enaa low level format tool v20047 download 2021
For the SM3257ENAA controller, two primary types of software are used depending on the quality of the flash memory inside your drive: If you are dealing with a "write-protected" or
Even with the correct tool, errors occur. Here is how to fix them in the context of the 20047 version. A legitimate SM3257ENAA_Low_Level_Format_v20047
If the manufacturer-specific MPTool is too complex, this general-purpose HDD Low Level Format Tool from HDDGURU is a reliable alternative for clearing partitions and hidden errors on almost any USB media.