folder mirroring

Folder mirroring on Windows involves keeping two folders or drives in sync, so that changes—including file additions, modifications, and deletions—are replicated from a source to a target. Users often seek free or built-in tools like Robocopy or Xcopy to achieve this, but must use the correct command-line switches (e.g., Robocopy's /MIR or Xcopy's /EXCLUDE) to ensure deletions are mirrored. Common use cases include mirroring files between USB drives or periodically backing up a folder to an external hard disk while maintaining an accessible, non-archived copy. The goal is a live, accessible replica rather than a compressed backup.