You have the choice of either ext. type drive or replacing the int. drive. If you plan to replace the int. drive it must be a match or actually fits and uses the same i/f as the old drive. So, be 100% sure it will work with your laptop model#. The quick and easy method is just buy an ext. drive that plugs into a USB port or eSATA if so equipped for ease of use. That's it, just use as any other drive. I do suggest you buy the "kit" form so everything is all present for use.
tada -[-----Willy 
Hi,
I have a:
HP Pavilion dv6-1131ea
and wanted to know if there would be any problems with adding a blu ray recorder to play movies and create backups?
Chowhound
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