The .part10.rar suffix indicates this is the 10th piece of a larger set.
This specific file cannot be opened or extracted on its own. It is an incomplete segment that requires all other parts in the sequence (e.g., part1.rar through part9.rar , and any subsequent parts) to reconstruct the original data. 2GB.part10.rar
Splitting files into segments (often 2GB in size, as the name suggests) acts as a "checkpoint" for downloads. If a 20GB download fails at 19GB, you only need to re-download the affected part rather than the entire 20GB. Extraction Requirements part1.rar through part9.rar