The best option would be to have a “regular” client that keeps a local copy in sync with the cloud instead of a mount.
BTW: IDK what cloud storage you are using, but IIRC some show files that are not available locally (ie. only the most recent files are downloaded locally - the older stuff is downloaded on request).
Alternatively, you could hack something together running unison locally in the guest to sync the cloud folder to a shared one… you’ll have two copies of the data though.
“mesh” is a buzzword that doesn’t make much sense (to me at least) if we are talking about wired and routers… what do you mean by it? can you describe your setup?
edit:
Let me clarify :)
Unless I’m mistaken, mesh means that one a bunch of devices, usually wireless access points, connected with each other (in a mesh) with possibly low-quality connections that automatically switch traffic for each other.
If you have ethernet running from the router to the APs, you always want to use that and so you don’t want a mesh at all.