Reply to Zipped Loop Pack? Collaboration, Information, Train Station, Californication,

So I'm starting out with a collab with this guy, no homo, and he wants me to send him a Zipped Loop Pack(?) when I'm done.

I use FL Studio and have no idea what this means, nor do I know how to do it. Anyone with any experience?

Also Collab General. What do I do if this guy just takes what I've sent him, posts it without revealing that I was apart of the track as well, essentially stealing my melodies?

First collaboration I've ever done, and would really appreciate some help!