Sub CopyData()
Dim sBook_t As String
Dim sBook_s As String
Dim sSheet_t As String
Dim sSheet_s As String
Dim lMaxRows_t As Long
Dim lMaxRows_s As Long
Dim sMaxCol_s As String
Dim sRange_t As String
Dim sRange_s As String
sBook_t = "Target Data WB- Copy data to WB.xls"
sBook_s = "Source Data WB - Copy data to WB.xls"
sSheet_t = "Target WB"
sSheet_s = "Source"
lMaxRows_t = Workbooks(sBook_t).Sheets(sSheet_t).Cells(Rows.Count, "A").End(xlUp).Row
lMaxRows_s = Workbooks(sBook_s).Sheets(sSheet_s).Cells(Rows.Count, "A").End(xlUp).Row
sMaxCol_s = Workbooks(sBook_s).Sheets(sSheet_s).Cells(1, Columns.Count).End(xlToLeft).Address
sMaxCol_s = Mid(sMaxCol_s, 2, InStr(2, sMaxCol_s, "$") - 2)
If (lMaxRows_t = 1) Then
sRange_t = "A1:" & sMaxCol_s & lMaxRows_s
sRange_s = "A1:" & sMaxCol_s & lMaxRows_s
Workbooks(sBook_t).Sheets(sSheet_t).Range(sRange_t) = Workbooks(sBook_s).Sheets(sSheet_s).Range(sRange_s).Value
Else
sRange_t = "A" & (lMaxRows_t + 1) & ":" & sMaxCol_s & (lMaxRows_t + lMaxRows_s - 1)
sRange_s = "A2:" & sMaxCol_s & lMaxRows_s
Workbooks(sBook_t).Sheets(sSheet_t).Range(sRange_t) = Workbooks(sBook_s).Sheets(sSheet_s).Range(sRange_s).Value
' ###################### NOTE #################
'the following lines are to be used of serial number is to be fixed too, instead of being copied
' if there is no need, then delete the line below
Workbooks(sBook_t).Sheets(sSheet_t).Range("A" & lMaxRows_t).AutoFill Destination:=Workbooks(sBook_t).Sheets(sSheet_t).Range("A" & lMaxRows_t & ":A" & (lMaxRows_t + lMaxRows_s - 1)), Type:=xlFillSeries
End If
End Sub
DON'T MISS