A .rar file is a compressed archive. Your computer cannot open it natively (unlike .zip files on Windows/Mac).
Look for the forum post, email, or message where the link was first shared. Download File 1w03n4053f3v.rar
Because "1w03n4053f3v.rar" is a generic identifier, you must find the exact URL where the file is hosted. right-click 1w03n4053f3v.rar .
Before opening the extracted files, run them through a scanner like VirusTotal to ensure they aren't malicious. Download File 1w03n4053f3v.rar
Once the download is finished, right-click 1w03n4053f3v.rar .