To see what is inside without automatically running any programs, use a trusted file extractor.
Without knowing where you found the file, here is a general guide to handling it safely: 1. Identify the Source 21108.rar
If you are still unsure what it is, try searching for the exact filename on specialized forums or technical communities like Stack Overflow or Reddit, as other users may have discussed the specific contents of that archive. To see what is inside without automatically running