its powered from the usb port....usb 2.0
yes i did drop it after that its not working.....the drive spins and makes little noise.......i dont knows the model number........
Is that "little noise" a steady clicking sound? If so, you've just encountered what's known as the "click of death." It's the drive head trying to seek to the beginning of the drive and failing, then the motor quickly snaps back into place (clicking as it does so) and trying again.
Given that you dropped the drive, I'd say it's pretty safe to say your drive is toast and you won't be getting anything off it. Probably a "head crash" which means the drive head made contact with the sensitive platters and damaged them.
If you want a shot at getting your data back, you'll need a specialist. Expect to pay hundreds of dollars.