This is a nice solution, given the limitations of the various service APIs it hooks into, but I feel like it's the wrong solution to a more general problem. If I'm understanding what's happening, a user has to hand over far too much access just to transfer files. In order for me to select one file from service A and have it transmitted to service B, I have to give service C access to all my files on service A. Does anyone else not see a problem with this? It would be the equivalent of the File Upload box in Internet Explorer letting a website see my entire file system just so I can pick one file to upload. This is the kind of allow all nonsense that users let slip by with the proliferation of ActiveX controls, but now instead of arbitrary access on my local machine, I'm giving service access to my cloud storage.
We actually see it as part of the solution to the permissions problem. By acting as this universal file provider, you no longer have to give access B or D or any other applications you want to use. We allow users to consolidate who they're giving access to.
