: The file extension indicates that the file is in RAR format, which is a type of compressed file. RAR files are often used for bundling and compressing large files to make them easier to transfer or share.
: Large 4K files can often exceed 20GB or 30GB. To make them easier to upload and download, they are "split" into smaller segments (volumes) using compression software like WinRAR or 7-Zip. You need all parts (e.g., part1 through part30) to successfully extract the original video. The Role of Multi-Part RAR Archives
Pick one (or give another safe topic) and I’ll write the essay.
: This indicates the file type and possibly its status in a series of files.