From native acces on pc to maschine +

You don’t have to do that. The expansions that are in NA are the NI official ones.

What you need to do is directly login to your account in M+ (you connect it to your Wi-Fi and then login on the device) and then download the NI expansions from the M+ (no computer involved).

If later you’ll want to add also groups you created with your sounds, this is a different story and involves the SD card. But since you are talking about NA, I suppose your question is about the expansions you bought from NI, therefore let’s stick to that atm