Help, Can't see external HDD anymore.

So, yesdturday everything was fine and today I can’t see and access my external HDD (Usb)

It still makes sound when I connect \ disconnect it, and it is “present” in “safely remove hardware” icon, but I can’t see it in explorer, in device manager or in disk managment.

I tried a few usb cables, but the effect is the same

Any Ideas?

P.s. now it works again…strange…I guess I better buy a new one.