Makes me think of Syncthing... I wrote a wrapper for it that attempts to make it easier for people to use:

https://github.com/chapmanjacobd/syncweb-py

https://github.com/chapmanjacobd/syncweb-ui

Unfortunately, mesh storage systems are very different conceptually so it is difficult for people to think about permissions and access. You can bolt on something familiar but then it really limits the usefulness of mesh storage and you may as well just be using HTTP servers.