Format a USB drive (8GB or less is best) to FAT32 .
The ".part2.rar" extension means the full firmware was too large for a single upload.
These files typically contain a MstarUpgrade.bin file or similar. Installation Process
The CV628H-B42 is a smart Android motherboard. The firmware essentially acts as the operating system, telling the hardware how to display images, manage inputs, and handle sound. 1366x768 (standard HD Ready).
Sony (programmed to respond to Sony-style remote signals).