Sub Сохранение()
Dim sDir, sFile, sName As Variant
Dim wb As Workbook

    sDir = ThisWorkbook.Path & Application.PathSeparator & "Save"
    sFile = sDir & Application.PathSeparator & Range("O4").Value
    sName = Range("O4").Value & ".csv"
    Columns("A:D").Select
    Selection.Copy
    
    Set wb = Workbooks.Add
    wb.ActiveSheet.Paste
    wb.SaveAs sFile, xlCSV
    wb.Close False
     
    Windows("Index.xlsm").Activate
    Range("A1").Select
    Application.CutCopyMode = False
    ActiveCell.FormulaR1C1 = ""
    Range("N4").Select
    ActiveCell.FormulaR1C1 = "Сохранено"
    Range("N5").Select
End Sub