Share Audacity project without convert in MP3

I am the drummer of my band.
I prepare drum track with Audacity. (Work very well)
i want to share the projet with the other musicien of my band.
Everyone receive the project. Add their track and send to the next member.
i want to share a open, no finish projet to my friend without convert in mp3 or other. Is it possible ?
i seem to me that if i export in MP3, it’s close the project. Is existing a possibility to simply rebuilt a multi track projet with mp3 exportation ?
Thank you.
From french Canadian.

Your original post has replies here:
As this is a duplicate topic I shall close it.