remoteStorage.js is a library for implementing applications similar to yours, where the backend storage is separate from the application provider.<p>The library primarily supports &#x27;remoteStorage&#x27; providers but apparently now supports google drive and dropbox experimentally.[1]<p>All the apps using remoteStorage that I&#x27;ve checked out don&#x27;t seem to have dropbox as an option though, and only some have google drive.<p>[1] <a href="https:&#x2F;&#x2F;unhosted.org&#x2F;adventures&#x2F;7&#x2F;Adding-remote-storage-to-unhosted-web-apps.html" rel="nofollow">https:&#x2F;&#x2F;unhosted.org&#x2F;adventures&#x2F;7&#x2F;Adding-remote-storage-to-u...</a>