Did you even read my comment? I even said it took me about an hour of upgrading cards and looking at abilities. I'll spell it out for you, you can just gather up a bunch of cards that each have the ability to stop all but a few of the gigabytes from attacking you. If you can't deal with only 3 gigabytes you wont beat the challenges anyway so there's no point in you trying. I will say you do have to button mash towards the end but it's nothing that bad considering it's already a strat that makes up for the user's own lack of skill