Using sd card for recordings

I’m not sure I follow, but you can put a card into your computer (or connect it to your computer with a card reader), put files on it, and then put the card in your Clip.  Or, easier, just connect the Clip (with card in it) to your computer and transfer your files onto the card directly that way–the computer should show 2 locations on the Clip, the internal and the external (card) memory.