What happens next in this paragraph?

How to reformat a laptop
Back up your hard drive.
Reformatting your laptop will cause you to lose all of your information so it is recommended that you back up your hard drive on an external hard drive, cds, or dvds if you wish to keep it.
Determine which method of restoration is provided by the manufacturer.
Choose from:
a). If you received a set of installation cds with your machine, then use this. If you did not, your computer may have a restore partition set up, which means you will need to employ a different method.;
b). The usb drive is the only, external drive that you can reformat. You will need to connect the hard drive to your motherboard, if any.;
c). Most reformatting is provided by the manufacturer. A cd-rom reader or photocopy will work just fine for simpler restoration projects that may be difficult.;
d). There is no substitute for wiping any backed up files to avoid outdated data. A list of other methods of restoration are available by sites like prioritized, reformata.com and nerdguides.com.;
a).