The computer does not see the external hard drive?

Question

Computers

Guys help the external hard drive is not as it is not detected by the system. The disk did not drop and did not succumb to any other influences. The indicator on the hard drive is on and the cooler is working, but it is not detected as such. It ceased to be determined after pulling out the usb-cable without its primary safe disconnection. Also, there is no disk either in the manager or in bios or anywhere.