A file named is a compressed archive file, where "AN" is likely a shorthand name or acronym, and the "(3)" indicates it is the third copy or version of that file downloaded to a specific folder.
Use WinRAR (the original software for this format) or the free, open-source 7-Zip . Mac Users: Use The Unarchiver or Keka . AN (3).rar
Compressed files are a common way to distribute malware because the contents are hidden until opened. If you do not recognize the source of "AN (3).rar," it is recommended to: Scan it with an antivirus tool like Malwarebytes . A file named is a compressed archive file,
Use apps like RAR (by RARLAB) on Android or iZip on iOS. Safety Note AN (3).rar