I write this script to compare to array, well Do you have a better way to do it? #include <Constants.au3> #include <Array.au3> #include <File.au3> #include <MsgBoxConstants.au3> $a = FileSelectFolder("seleziona cartella A",@ScriptDir) $fold_A = _FileListToArrayRec($a,"*",2,1,0,1) $b = FileSelectFolder("seleziona cartella B",@ScriptDir) $fold_B = _FileListToArrayRec($b,"*",2,1,0,1) $tota = UBound($fol