This indicates the file is part of a larger multi-part archive . You will likely need "part1" and "part2" to successfully extract the final firmware file using a program like WinRAR or 7-Zip . How to Use This Firmware
Place all parts of the archive (part1, part2, part3) in the same folder and extract them to get the single firmware file (often ending in .bin or .img ).
The flash drive should be formatted to FAT32 . These boards often struggle to read other file systems like NTFS or exFAT during the boot process.
This is the specific display resolution the firmware is configured for. Using firmware with the wrong resolution can lead to a distorted image or a blank screen.