Dare to use / test all different drivers on different systems from different vendors to read / write single piece of disk with some valuable data is really brave.
Use NAS.
Use an API for cross platform sharing layered on top of a filesystem: Either a Virtual Machine sharing protocol (aka 9p virtio) or a real network protocol AFP/SMB/NFS. Anything else is taking your data in your own hands and is antithetical to the design of modern OSes.