Add timestamp and then file extension (xlsx) to a file and move to the archive Folder

Thank you for the effort.
I got the following error

I think I have to do a couple of things

  • removing the pre-existing ‘xlsx’ as you can see in the above error message
  • adding the timestamp
  • adding the extension (xlsx)

Q: Where should I make these changes? Is it before moving at the current location and moving after the renaming has been done?