My Passport 2TB is not recognoise in USB 2.0 port

WD External Drives WD Portable Drives
1

In first time when I conect the hd he is recognoise , but after some time, disapear…
My passport 2TB is not recognoise in usb 2.0 port. In my Samsung TV, my desktop PC and in my notebook Acer…

Please ! ! ! What I have do to this hdd be recognoise in any usb 2.0 port ? ? ?