Why should the files get uploaded to the cloud? I thought that any files would be accessed direct from your drive as & when requested, otherwise why leave the Pogoplug switched on?

But you're right, it would be nice to have an overview in fairly basic terms, of exactly how the system works.

I put files onto the pogoplug drive that I may want to share or access from a remote location via the internet onto a pc or iPhone app.

Family & friends around the world are able to access these files at my invitation.
I could do this just using my pc, but that would mean leaving it running continuously. I see the Pogoplug as a mini-pc running a dedicated file-sharing programme.

But I don't really know the details how it works, what the involvement of Pogo's servers is etc etc.

I should add that the Pogoplug is able to do more than what I use it for.