Canon EOS 5DS Instruction Manual page 356

a Copying Images
3 Copying All Images in a Folder or on a Card
You can copy all the images in a folder or on a card at once.
356
8
Select [OK].
Check the information of the source
card and target card, then select
[OK].
The copying will start and the
progress will be displayed.
When the copying is completed, the
result will be displayed. Select [OK] to
return to the screen in step 2.
Under [x1: Image copy], when you
select [Sel.n] or [All image], you can
copy all the images in the folder or on a
card.