: Likely indicates that the archive was split into 2-Gigabyte chunks for easier hosting on file-sharing sites.
: Refers to DODI Repacks , a well-known group in the digital piracy and software preservation community that specializes in highly compressed installers. GTHMDODI2GB.part08.rar
Files like these are commonly found on torrent sites or file-hosting mirrors. If you didn't download this yourself, be cautious, as random archive files from the internet can contain malware or unexpected software. : Likely indicates that the archive was split