You would want a copy of the entire folder that contains your catalog to the desired disk location on your PC. This can be anywhere that you prefer it to be. The default location on a PC using your pictures folder, and then the folder that contains your catalog. On the PC the name of that folder that contains the catalog is Lightroom. Then you would want to copy all of the images to the PC. Since the hard drives will probably not be named the same, when you start Lightroom on the PC you will have to right-click on the folders in the library module and choose to update the folder location or find missing folders. This will be easiest to accomplish if you have all of your image folders organized within one master folder. Then you only have to find the missing master folder, and everything else will be synchronized.