Replace HDD hard disk

Open the latch on the right side that secures the battery in place.

Open the latch on the left side that secures the battery in place.

Now remove the battery.

Use the Philips screwdriver to remove the two screws on the bottom cover.

Check the markers to determine how to remove the cover.

Now remove the cover as prescribed by the markers.

The components HDD hard disk and BIOS battery are now visible.

Unplug the HDD hard drive from its SATA3 connector.

This is what the HDD hard drive looks like