I am trying to find a really simple to use free view recorder set top box, for a present for an older person who does not have wifi - they have a smart tv. I have just gone onto amazon and am completely lost - do I need to get a usb/as card/external drive as well or do they have a hard drive? Is it better to pay extra for a hard drive? How much memory do you need to record a decent amount of telly? Is it doable under £35-40? Help!!!