I can try to help on this project. DSM is just a web interface on top of linux. The underlying is linux filesystems, either ext4, btrfs, xfs, zfs, lvm or a combination of them. The external protocols can be NFS, samba, iSCSI. I can take a look even before you decide to award this project to me. I'll quit if I can't do it. We are in similar timezone so it's easy to communicate.