Because of this site...
 

my HD is full. Anybody know if I can easily add bigger drive to an HP laptop? (I already have an external back up but don't want to always deal with both).

any help would be appreciated

Rev,

I feel your pain. I have two 750GB external drives to hold all the treasures.

You usually can't add an internal drive to a laptop, but you should be able to replace the current one with a larger version. You will need to either clone your existing drive to the new one and switch, or replace the drive and reinstall your OS. Once you have made the switch, you can wipe the old drive and put it in an external enclosure. That way you can maximize your storage space.

No, get one of those Western Digital USB drives (powered through the USB port) and velcro it to the top of your laptop. Call it "steam punk" and everyone will think you're cool.