January 28, 2011 4:52 PM

You can buy any 3.5" SATA drive, in general 500GB plus is what these units came with.

You can order a recovery kit for your unit from HP if it still has a serial number, if not you will need to buy yourself a copy of Vista or Win7 from your favorite retailer, and then download the appropriate applications from hp.com.

I strongly recommend ordering the recovery kit from HP if possible.