The YouTube video Android TV Firmware Installation TP.MS358.PB801 provides a full tutorial and a Telegram download link in its description.
provide specifications and occasionally software support for the TP.MS358.PB801 Installation Steps Download MS358 PB801 1366x768 512M USB part3 rar
Place the extracted firmware file (usually named allupgrade_ms358.bin or similar) onto the root directory of the USB. The YouTube video Android TV Firmware Installation TP
Usually distributed as multiple .rar parts (e.g., "part3") due to file size. Where to Find the Download Download MS358 PB801 1366x768 512M USB part3 rar
Format a USB drive (8GB or smaller is recommended) to FAT32 .
Firmware for these generic boards is often hosted on technician forums and YouTube tutorial descriptions. You can find related software and installation guides at the following locations: