File sharing between partners

[Shannon M.]

It seems like many of us partner on all or some of our deals. What are you doing to share files and make documents available to partners? My partner and I live in different states and I would like to set something up that each property has a file that we can both use for reference and to see what is happening with the project.
Bigger Pockets has saved me from re-inventing the wheel in other areas, so I thought I would ask here first.

Respectfully,