I have the WD TV Live HD Media Player (MP) connected to a 3TB Seagate HDD and has worked fine for years. I attached the HDD to my PC to update it (~2 weeks ago) & when reattached to MP it no longer works (either usb port). So:
MP with mem stick USB2 (Fat) works OK
MP with 1.5TB Samsung HDD USB2 FAT32 works OK
MP with 2TB WD HDD USB2 NTFS works OK
MP with 3TB Seagate HDD USB3 NTFS not recognised any more, but works correctly with PC (Win 8.1 64bit) - no scan errors and can write & playback video files.
I then reformatted (quick format) the HDD and reloaded the media files but still not recognisedby MP (& changed usb cable to make sure). The MP starts up OK, causes the HDD to spin up but the USB device does not show on the Video tab chain (nor on any other chain) but seems otherwise operational.
MP has latest firmware Ver 1.06.43_V but I understand that this version is not recent and so must have been used when it was previously working OK with the same HDD.
So unless the MP can no longer work with USB3 HDDs but is OK with USB2 HDDs I cannot see what else can be causing the problem - any comments would be appreciated.