Multiple users for ReadyCloud without ReadyNAS

I love my new router. I have a eSata hard drive connected to the router and it does a great job allowing it to act as a file server for my home/work environment. I set up the ReadyCloud account and wanted to allow several people access to the files throught the cloud. I found instructions on how to do it if I were using a ReadyNAS, but not a regular attached device. It would be great to have the same capability for a eSata HD or USB HD that there is for the ReadyNAS.

Right now we are sharing links to folders, but it is not as clean or easy to manage as multiple users would be.

Thanks for considering this idea.

Doug