Darth Venal said:

Ripplin:

They could've easily said 'holo-tapes' or something like that

Well maybe it's slang for just that, like 'droids is. Lucas certainly tried to get a real-world thing going in the original Star Wars, so I'm perfectly happy to accept that. And as I was saying before, tapes are a lot less archaic a storage material than people think. A reel of the best digital tape holds a hell of a lot more material than any disc of equivalent diameter, so there's no issue for me.

That's why there's a tape-deck in Luke's X-Wing.