You want to copy the selection to all workbooks in the folder where the first
four characters are numeric.
Then Try this with a few test files in a folder
see also
http://www.rondebruin.nl/copy4.htm
Sub Prova_test1()
Dim basebook As Workbook
Dim mybook As Workbook
Dim Fnames As String
Dim mypath As String
Dim rng As Range
Dim SaveDrivedir As String
SaveDrivedir = CurDir
mypath = "C:\prova"
ChDrive mypath
ChDir mypath
Fnames = ("*.xls")
If Len(Fnames) = 0 Then
MsgBox "Non ci sono file nella directory"
ChDrive SaveDrivedir
ChDir SaveDrivedir
Exit Sub
End If
Application.ScreenUpdating = False
Set basebook = ThisWorkbook
Set rng = Selection
Do While Fnames <> ""
If IsNumeric(Left(Fnames, 4)) Then
Set mybook = Workbooks.Open(Fnames)
rng.Copy mybook.Sheets("Febbraio").Range("A1")
rng.Copy mybook.Sheets("Gennaio").Range("A1")
rng.Copy mybook.Sheets("Marzo").Range("A1")
mybook.Close True 'save the file
End If
Fnames = Dir()
Loop
ChDrive SaveDrivedir
ChDir SaveDrivedir
Application.ScreenUpdating = True
End Sub