The cable supplied is 80cm long for me. I don't know if it will fit your Panasonic TV. I have connected my hard drive to a Durabase (very cheap model) and I can record without any problems. I only connected the hard drive to the TV via USB (no external power source).

Good day; the enclosed cable is not very long, about 20 cm; it can certainly also be used as a recording HD for a TV, power is obtained via USB, of course formatting via the TV is necessary. Then the HD for the TV will work.