HP Compaq Presario,Presario 800AP Supplementary Manual page 102

To retrieve files that may have been lost or damaged, you should
back up your files regularly to diskettes or other backup media.
You can back up all the files on your Notebook or you can select
specific files and folders. Use diskettes to do a partial backup of
selected files or folders.
Use backup devices such as tape drives or other high-capacity
backup devices to do a complete hard-drive backup.