I'm looking for online storage that can "corral" many other forms of online storage like FTP, SSH, WebDAV, and commercial services like Google Storage and Dropbox, and to keep these files "in sync". In other words, I'm looking for a cloud storage service that will connect all the various forms of storage I work with or that my clients hand to me (i.e. Dropbox) in one virtual filesystem.

Second to that, I'm looking for something with strong versioning features. And second to that, I'm looking for something with good ability to show a "preview" of most file types within the browser, and to let me write notes and annotations on any file type.

P.S. I'm willing to do some work to set up a software stack on a bare-metal machine that I control in order to achieve the desired functionality if there isn't a commercial service that provides all these features.


Your best bet is to find a Dropbox alternative that is open source (this page might help). If you run it on your own servers, then you can naturally give SSH/SFTP access to the same filespace. To sync it with Google Storage you'd just need to use the Google Storage API.

If an off-the-shell solution doesn't exist, you could make use of SpiderOak's open source tools that they use on their own competing service.


You could just setup Dropbox on a server that syncs to/from a directory that is accessible by SSH/SFTP and also sync that folder to Google Storage.

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