Need help with modifying the VBA code Extract data

Hi all,

I was tring to extract data from the folder called Main Source2.
The file OutputA containing VBA code to extract data from Column B of "Sheet1" of "Data yyyy.mm.dd" from subfolders inside folder Main Source2.

I would like to modify the VBA code I have now to add Column C of "Sheet1" in "Data yyyy.mm.dd" to "Sheet2" of OutputA and Column D to "Sheet3" of OutputA.
Can anyone help me with this? Many thanks.
The source files are attached.

Best Rdgs

Can anyone help with this?