questions about PS2 games

Hi,





why oh why does my PS2 slim play 90% of my games and then decide not to play my Favorites 3 games, that I've been playing for the last six months perfectly fine. I cleaned it (console) the disc is not scratched on bent, broken etc. My other games boot and play fine.





Can someone tell me where I can get some info on adding a harddrive to the ps2 slim model and their experience with that.





Please help.





Thanks!

I did not find the right solution from the Internet.













References: www.gamespot.com/forums/retro-gaming-909394552/is-this-the-right


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