If it was linked in a forum or chat for a specific "feature" (like a game mod or software crack), it is likely a malicious payload.
If already downloaded, use a service like VirusTotal to check the file's hash before attempting to extract it. 30.rar - AnonFiles
If you tell me this file was associated with (e.g., a specific game mod, a tool, or a leaked database), I can help you identify its intended "feature" or provide a safer alternative. How to Open RAR Files on Windows, Mac, and Mobile - Avast If it was linked in a forum or
Generic numeric filenames (like 30.rar or 1.rar) were often used by automated scripts to distribute trojans, info-stealers, or ransomware . How to Open RAR Files on Windows, Mac,
Since AnonFiles is no longer active, any current "30.rar" links claiming to be from that site are likely malicious redirects or phishing attempts.
Files from defunct anonymous hosts are high-risk.