Espero que no te lo tomes a mal, pero, ¿has leido el manual?


http://tda.panasonic-europe-service..../TQB0E0929.pdf

Pág 60
●Register the USB HDD with this TV in order to use it for recording. Please note that USB HDD will be formatted and all data (including the data from your PC, etc.) in it will be erased when you register it.
●In order to use the USB HDD with your PC after you use it with this TV for recording, format the drive on your PC. To format, refer to the manual of the PC. Please note that all data in the USB HDD will be erased when it is formatted.
●The data recorded to the USB HDD with this TV can only be played back on this TV. You cannot playback its contents with another TV (including the TV of the same model number) or any PCs.

Pág 66
Using Media Player Media Player allows you to enjoy photo, video or music recorded on an SD Card and a USB Flash Memory, and recorded contents on the registered USB HDD


Un consejo: sé escéptico con lo que "te digan en la tienda", ahora con internet es muy sencillo contrastar datos y especificaciones. Te ahorrarás molestias, cuando no directamente mucho dinero.