How to improve the running speed of this VBA macro code?

I do not have much experience with writing macros, and therefore need the help of this community for the following issue encountered:

My macro copies a range of values entered in a vertical range in one worksheet and then pastes the values horizontally (transpose) in another worksheet. It would in theory paste the values from the first sheet to first row of the second worksheet which does not have content. Since the first five rows have contents, it thus pastes the values to the sixth row. The problem I have with the running of the macro is that I feel like it is too slow and I would therefore like it to run faster.

I have the same macro doing the same thing but that instead pastes the values to another worksheet to the first row, and it runs perfect.

My best guess is therefore that the second macro is running slow because it has to start pasting on the sixth row and there may be some contents on the first 5 rows that take a lot of time for the macro to go through (there a lot of cell references to other workbooks) to determine where the next row for pasting should be. That is my best guess though and since I hardly know anything about macros, I cannot say for sure what the problem is.

I hereby provide you with the code of my macro and sincerely hope that somebody can tell me what is making my macro slow and provide me with a solution as to how to make it run faster. I am thinking that a solution might potentially be that the macro should not consider the first five rows of data and start pasting immediately on row 6 for the first entry. Then on row 7 the next time, and etc. This might be a solution but I do not know how to write the code in a way that it would do that.

Thank you for taking time and helping me to find a solution, here is the code:

Sub Macro1()
wksPartsDataEntry.Unprotect
Sheet11.Unprotect
Application.ScreenUpdating = False
Application.Calculation = xlCalculationManual

    Dim historyWks As Worksheet
    Dim inputWks As Worksheet

    Dim nextRow As Long
    Dim oCol As Long

    Dim myCopy As Range
    Dim myTest As Range
    
    Dim lRsp As Long

    Set inputWks = wksPartsDataEntry
    Set historyWks = Sheet11
    
      'cells to copy from Input sheet - some contain formulas
      Set myCopy = inputWks.Range("OrderEntry2")
  
      With historyWks
          nextRow = .Cells(.Rows.Count, "A").End(xlUp).Offset(1, 0).Row
      End With
  
      With inputWks
          Set myTest = myCopy.Offset(0, 2)
  
          If Application.Count(myTest) > 0 Then
              MsgBox "Please fill in all the cells!"
              Exit Sub
          End If
      End With
  
      With historyWks
          With .Cells(nextRow, "A")
              .Value = Now
              .NumberFormat = "mm/dd/yyyy hh:mm:ss"
          End With
          .Cells(nextRow, "B").Value = Application.UserName
          oCol = 3
          myCopy.Copy
          .Cells(nextRow, 3).PasteSpecial Paste:=xlPasteValues, Transpose:=True
          Application.CutCopyMode = False
      End With
      
      'clear input cells that contain constants
      With inputWks
        On Error Resume Next
           With myCopy.Cells.SpecialCells(xlCellTypeConstants)
                .ClearContents
                Application.GoTo .Cells(1) ', Scroll:=True
           End With
        On Error GoTo 0
      End With
  
Application.Calculation = xlCalculationAutomatic
wksPartsDataEntry.Protect
Sheet11.Protect
Application.ScreenUpdating = True
End Sub