: This is the first segment of a multi-part compressed archive. You will need all parts (e.g., part2, part3) in the same folder to extract the contents successfully using tools like WinRAR or 7-Zip . Likely Contents of the Archive
: A file like Stm32ud.bin or similar for the micro-controller unit. sc25131-LTS2v103.part1.rar
: Right-click part1.rar and select "Extract Here." Copy the resulting files (not the folder) directly to the root directory of your USB drive. Do you have the other parts of this archive, or : This is the first segment of a
: This often identifies the specific hardware platform or chipset, frequently associated with Unisoc (formerly Spreadtrum) processors used in car infotainment systems. sc25131-LTS2v103.part1.rar