: Use a USB flash drive formatted to FAT32 .
The text refers to the first part of a compressed firmware update for the TP.MT5522.PC821
like WiFi or new applications on older displays. Download MT5522 PC821 3840x2160 USB part01 rar
: Download all parts of the archive (e.g., part01, part02) and extract them to get the single .img firmware file.
To update your TV software using this file, follow these standard procedures found on resources like Software-Zon and Scribd : : Use a USB flash drive formatted to FAT32
Plug the TV back in and turn it on. The update should start automatically.
: Remove the USB drive, unplug the power once more, and restart the TV. unplug the power once more
: Compressed .rar (often split into parts like part01.rar ) containing an .img update file. USB Installation Instructions