If you have any difficulty working out where the disk is, or if you're just curious to see inside, you can unscrew the lid.

You will generally need a Torx screwdriver. There are normally 6 screws around the perimeter of the drive. Remove these.

Most laptop drives have one more screw under the label. You will need to locate it by feel, or by viewing it with the light at just the right angle.

Scrape away the label from around the screw head, using a craft knife or similar. Under the label there is likely to be a layer of foil. Scrape this away as well, revealing the screw head. Remove the screw.

Desktop drives may have more screws, which you will have to locate and remove in the same way.

Once you have removed all the screws you should be able to prise off the lid. A rubber seal may make it a little reluctant to come off.

Replace the lid and secure it with at least 2 or 3 screws before proceding to the next step.