Little explanation. today feature a TV recording function (like our good old VCR) but the disc (or tape to make the analogy with VCRs). So add on TV, on its USB port, a storage drive. Storage on USB stick is now too small. The SmartTV prompted, memory, storage from 180 to 250 GO minimum to run.
The TV's are not, for now, not yet equipped with USB ports 3. While current external hard drives are USB 3. It is entirely possible to plug a USB drive into a USB 3 TV 2 but Consumer Disc (taken from the USB socket 2) is often more important and this sometimes works poorly.
Hence the idea of SONNIC recycle old boxes in 2 USB low power consumption, we sell at high prices but are a guarantee of optimal operation.
Nothing to say, but do not be fooled ...