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It can't. This is the type of features that have to be developed for each OS separately.

• jorangreef 10y ago
  Yes, that's what's I meant, how would you develop it on Windows vs OS X etc? What options are available on those platforms?
  • dkopi 10y ago
    I don't know how dropbox has actually implemented this, and I'm not sure about OSX, But on windows you might use a kernel file system filter driver or a shell namespace extension: https://msdn.microsoft.com/en-us/library/windows/desktop/cc144095(v=vs.85).aspx https://msdn.microsoft.com/en-us/library/windows/desktop/cc1... This looks like an open source project that provides something similar for google drive: https://github.com/google/google-drive-shell-extension https://github.com/google/google-drive-shell-extension On linux this could probably be even easier, just mounting a directory to a remote NFS server.
    • hemancuso 10y ago
      If you look in the Dropbox install the driver is already being distributed on Mac and Windows. It's a filter driver.
      • deleted 10y ago
        [deleted]