Current Panasonic Viera TVs support USB HDDs. I've just purchased a TX-L37V20B. However, I'm finding that some types of drive do not work. Panasonic provide no guarantee that all HDDs will work, referring to TV | Digital AV | Consumer Products | Support | Panasonic Global for USB HDDs that have been tested. To date, only one type of drive is listed! I use external HDD enclosures and docking stations. I tried a USB SATA dock with an integral USB hub – this would not work. The TV reported that the device is not directly connected to the TV. The Operating Instructions inform: 'Please do not connect the device via a USB HUB'. A standard IDE HDD enclosure with 80GB drive would not register. Fair enough: the Operating Instruction say drives must be between 160GB and 2TB. So I substituted a 320GB IDE drive in the enclosure. This registered successfully, but Rewind Live TV didn't seem to work. One touch recording and timer recording did appear to record because the orange timer LED on the TV flashed and also the HDD activity light – but on trying to playback, no recording was listed in the Media Player! Can anyone confirm types of external USB HDD that do work? Only a USB HDD that has been ‘registered' for use with the same TV may be accessed, ie. only video files recorded by the same TV may be played by Media Player. Using some form of protection/encryption, Panasonic has prevented interchange of USB HDDs between other Viera TVs and also PCs. (See also http://www.avforums.com/forums/lcd-led-lcd-tvs/1303746-panasonic-viera-tv-media-player-usb-hdd-restriction.html ). Even worse, Panasonic declare that if the TV is repaired the registered USB HDD may not work with the repaired TV! Has anyone successfully managed to access files via a PC on a USB HDD that has been registered for use by a Viera TV?