I stopped using third-party file transfer tools after discovering Robocopy

Robocopy is a built-in Windows command-line file transfer tool that has been available since Vista but remains largely unknown. Unlike standard copy tools, it is differential by default (skipping unchanged files), supports restartable transfers via /Z, and offers detailed logging. Mirror mode (/MIR) keeps a destination directory perfectly in sync with a source, making it ideal for backups. A practical backup command combining /MIR, /Z, /MT:8, /R:3, /W:5, and /LOG is provided. One key gotcha: /MIR permanently deletes files not present in the source, bypassing the Recycle Bin, so always run a dry run with /L first.