This is for a Dell E4300 E4310 E-series 2nd hdd module with USB External Cable.

How to use:

1. This module can hold a SATA hard drive and put in internally, therefore you have two hard drives in one laptop.

2. You can use it as an External Hard drive (module+hard drive+External usb cable)

3. You can use the USB external cable to make the optical drive externally.