If you cannot open a file because it is corrupted, you can try repairing it:

Use WinRAR: Right-click the files > "Add to archive..." > Select "RAR" as the archive format.

Open the file in WinRAR, click the "Repair" button in the toolbar.

WinRAR is the native tool. You can also use free alternatives like 7-Zip. macOS: The Unarchiver or Keka are common choices.

If the file is or if you are looking to split a large file into smaller pieces , let me know—I can provide steps for that too!

If you want to compress files into a RAR archive: