External hard drive insert a disk into Removable disk


I have a lenovo f309 portable hard drive. It was working fine until now. But now when i connect it to a pc the light comes on and the drive makes noises of rotation but ion the file manager it only shows removable disk(k). And when i open it it shows this message- please insert a disk into Removable disk(k).

Could anyone give me any suggestions as to what the problem might be and if it can be fixed.