WinRAR or 7-Zip are the standard tools. Right-click the first file in the sequence (usually 0001.rar or part1.rar ) and select "Extract Here". The software will automatically find and join the subsequent parts like 0002.rar .
Use The Unarchiver or Keka , which support reassembling split segments via drag-and-drop.
If you have a file named 0002.rar , you are likely dealing with a multi-part compressed archive. These are used when a single file is too large for certain storage systems or email attachments.