This is not by me, it's the Apple icon for the HDD (or a reconstruction thereof, as I can only get hold of Apple icons via deviantArt), 512 pixels and four layers.
One layer for the disk's base and shadow, one for the LED if the user wants to change LED colours, one for the disk top if the user wants to change something or impose a photograph, one for the rivets and label.
I did this by request as it's similar to a procedure I used for customizing this icon (I would use a bunch of PNG files instead).