Anyone have a DISH 211k with extra drive for DVR?

I have a 211k receiver and have installed an external hard drive. I made sure to get one that is externally powered. They are readily available but when you purchase it be sure to check as many are powered through the usb port and I don't think the 211 will support that. I believe mine is a seagate and I got it at best buy, in the store. It simply plugs into a 120 v recepticle and to the 211 via a usb port. Direct tv provided the download software and I was in business very quickly.