1- Shutdown your computer. 2-Turn over your computer
3-You will find one screw below the optical drive (Probably with a logo)
4-Then just take out your optical drive by pulling it.
5-Mesure the height of your optical drive (12.7mm or 9.5mm)
6-Remove the front panel of your old optical drive.
7-Put your new hard drive into a SATA Optical to hard drive adapter
8-Slide the adapter with hard drive inside your computer
9-Put back the screw and boot your computer.