sea gate 2TB external hard drive not connecting

[Amandat73]

I own at sea gate external hard drive and a MacBook Air.
Previously when connected the MacBook would read and allow the hard drive to connect.

Now, when plugged in. The device makes a humming noise but the mac does not recognise or read the device

 

[Reynod]

Could just be a dirty usb connector so clean the macbook port and the cable with a toothbrush.

Try connecting the drive to another computer.

The drive may have died.