Hi John, I've been using the cheap one (99 dollars) and it works well. They expect the hard-disk/memory stick to be formatted FAT32. The system could do that for you. The recording format is proprietary: it's .mpg, but if you play it back, there is an enormous amount of jitter every 5 seconds or so. There is no documentation, maybe because FreeView told them to keep it secret. The USB-connection is USB2 and supplies 500 mA of power: that should be enough for a memory stick but not an ordinary HD (they usually draw about 1000 mA). I've kept an old HD out of a notebook and use it with an adapter. It's slow but I've never lost anything. Maybe there are Y-connectors around that would bump the HD's power to 1000 mA, but I've not managed to find one. The system records in ordinary density and doesn't use a lot of space. As everything is so proprietary I haven't found a way to transfer/add parts to another HD/stick. Everything sits in 1 directory with a few subdirectories. Transferring the stuff to a computer would work if you filmed the TV-screen. You would then also be able to cut out the ads. I've read somewhere that there are devices that would record HDMI-output (which the DishTV provides) on a USB-device, so that should do the job. Gameplayers use something like that to record their moves... Just an aside: recording OnDemand movies: easy if you use 'simplescreenrecorder' (Windows and Linux). It creates an MKV-file you can edit. Tom.