[ZA]

Go ahead and compress the files (stuffit). Not only will it make the transfer simpler (1 file vs. 5), but you can also squeeze the file size down without losing audio data. File compression formats like stuffit & zip are lossless.

Also, it helps if the person on the other end does their edits without changing the audio data (using realtime effects, mix levels & automation). That way they don't have to send back the audio files, just the session document. At the very least, remind them not to include the audio data files they haven't changed.

This might not apply to you, but it's something I've found handy.