I am a long time Windows user, recently switched to Mac. I replaced folder by another folder (they had the same name) thinking that OS X would merge the contents of the two folders. But OS X has deleted the original folder and replaced it with the new one. Windows merges the two folders (which I often do on Windows). I have now lost hundreds of files. I did not activate Time Machine. I've tried using Finder Undo, but it does not work.
Currently, I am trying to recover my data with the help of photorec. He indicates that the estimated time is 7 hours and 31 minutes. Does anyone know a faster and more powerful free data recovery software?