Ensure your USB drive is formatted to FAT32 before copying the firmware.
and is a common source for these specific "part1/part2" archives. ШЄЩ†ШІЩЉЩ„ P65 358TV6 1366x768 FRESH part2 rar
This site frequently hosts firmware for the TP.MS358.PB801 Ensure your USB drive is formatted to FAT32