If you have the harddisk out of the shell, buy 1 package of sparklers, if it's inside it, get around 4-5 packages (the metal sticks with grayshit on them)
Strip the grayshit (magnesium normally, if its something else it probably wont work as well through the case) and crush it into a powder off of all sparklers but 1, you can strip the last one down to about an inch or so from the tip. Pile it all on the harddisk/shell, light the sparkler tip that's left, insert into the pile, and other than it appearing as though the sun is arm's length in front of you for 5-10 seconds, anything underneath shall be melted/vaporized due to the white hot heat released. I've melted through steel grills at my local beach at night this way before, around 11pm 1 package of sparklers prepared this way lit up the local beach on long island sound for about a mile in all directions as if it was daytime.