I have a maxtor one. I have a maxtor one touch 4 external 1 TB hard drive, it was knocked over to

Question

I have a maxtor one touch 4 external 1 TB hard drive, it was knocked over to the floor for a total of a 2 foot drop. Since then it will not show up as a drive when connect through usb but show that a device has been added. Also a beeping noise keeps ringing out. I have almost 80% of that drive filled up, I really need to recovery that data, what can i do