Not all SSS6698 tools are identical. Try searching specifically for a version that supports the TC58NC6623 specifically.
Complete Recovery Guide: How to Get Your TC58NC6623 / SSS6698BA MPTool to Work
According to usbdev.ru, the 3S USB Mass Production Utility v3.287 or similar older versions are necessary for these specific older chips. tc58nc6623 sss6698ba mptool work
✅ SM3268AB_TC58NC6623_MP_v2.5.59_v3_S0917
The TC58NC6623 SSS6698BA MPTool work involves several technical aspects, including: Not all SSS6698 tools are identical
: This is the true controller model . SSS (Solid State System, also known as "鑫创" in Chinese) is a Taiwanese company that designs USB flash drive controllers. The TC58NC6623 is a Toshiba-branded version of an SSS reference design, and its internal architecture is the SSS6698-BA. As one source confirms, TC58NC6621 corresponds to the SSS6698-BA controller.
This is the tricky part. Silicon Motion does not release these tools to the public; they leak via factory support sites. ✅ SM3268AB_TC58NC6623_MP_v2
Note: These tools are often flagged by antiviruses because they operate at a low hardware level, but they are generally safe, provided you download from trusted specialized sites. 3. Run the Tool
You must choose a configuration file ( .INI ) and a firmware file ( .BIN ) that matches your Flash ID. If your exact ID isn't listed, the tool will likely fail with an "ISP Code Not Found" error.