With most gaming laptops upgrading the storage means replacing the drive in the system (there simply isn't room for another drive in most cases--which I believe is the case for either of these models). Your best bet is investing in a portable, external hard drive and taking it with the laptop. You can, of course, replace the drive in the system, but that can be pretty difficult since you'll need to copy a lot of the information in the current hard drive first, then transfer it all to the new drive,etc.