'but without opening the files'
... so when someone would see those moves?
And 'this' move means really move - not only copy? For me, much easier to do with opening or while opening.
1) Move =
information from cell moves to other cell. The 1st cell will be empty after that!
2) If without opening to do something ... why need to do those?
3) As I wrote with smaller text: For me, much easier to do with opening or while opening.