Check developer-focused hubs like the XDA Developers Android Head Unit Forums or developer repositories on GitHub for K2001/K2101 platforms to find shared update archives.
: Power on the head unit and insert the USB drive into the 6-pin cable port. Navigate to Settings : Open Car Settings > System Settings . Find the System Update option. nwd k2101 t3 update full
There are many clones of the K2101. Using the wrong firmware will permanently brick your watch. Check developer-focused hubs like the XDA Developers Android