Hi, try this vba ode, you will get popup asking version number: erase the content and enter only version nummber
example: if you want to save as xlsx, then enter only 51
xlsx - 51, xlsm - 52,xls - 56,xlsb - 50. you can play with it and modify accordingly.


'bala sesharao created to save the worksheets as seperate workbooks
Private Sub Workbook_Open()
Call Copy_Every_Sheet_To_New_Workbook

End Sub
Sub Copy_Every_Sheet_To_New_Workbook()
'Working in 97-2007
Dim FileExtStr As String
Dim FileFormatNum As Long
Dim Sourcewb As Workbook
Dim Destwb As Workbook
Dim sh As Worksheet
Dim DateString As String
Dim FolderName As String

With Application
.ScreenUpdating = False
.EnableEvents = False
.Calculation = xlCalculationManual
End With

'Copy every sheet from the workbook with this macro
Set Sourcewb = ThisWorkbook

'Create new folder to save the new files in
DateString = Format(Now, "yyyy-mm-dd hh-mm-ss")
FolderName = Sourcewb.Path & "\" & Sourcewb.Name & " " & DateString
MkDir FolderName

'Copy every visible sheet to a new workbook
For Each sh In Sourcewb.Worksheets

'If the sheet is visible then copy it to a new workbook
If sh.Visible = -1 Then
sh.Copy

'Set Destwb to the new workbook
Set Destwb = ActiveWorkbook

'Determine the Excel version and file extension/format
With Destwb
End With

'Change all cells in the worksheet to values if you want
If Destwb.Sheets(1).ProtectContents = False Then
With Destwb.Sheets(1).UsedRange
.Cells.Copy
.Cells.PasteSpecial xlPasteValues
.Cells(1).Select
End With
Application.CutCopyMode = False
End If
FileFormatNum = InputBox("enter the version number for", "versioning", "xlsx - 51, xlsm - 52,xls - 56,xlsb - 50")





'Save the new workbook and close it
With Destwb
.SaveAs FolderName _
& "\" & Destwb.Sheets(1).Name & FileExtStr, _
FileFormat:=FileFormatNum
.Close False
End With

End If
GoToNextSheet:
Next sh

MsgBox "You can find the files in " & FolderName

With Application
.ScreenUpdating = True
.EnableEvents = True
.Calculation = xlCalculationAutomatic
End With
End Sub


all the best