My Seagate 1TB Backup Plus Portable Drive isn't detected on my laptop even when I tried a different USB cable (this hard drive only uses USB cable, no power supply). Moreover, when I plugged it into my TV as I usually store movies and music in it so I can watch it on my TV through the USB port, the TV doesn't recognize it either even though the light is on and I can hear the sound from the drive. My two other drives work fine so I don't know what the problem is.