wow, it actually make sense, yesterday i decided to try all the possibility and play the game from my 32GB usb stick (slow usb stick for sure haha) and it works great, no freezes whatsoever.
So i thought the game works better on external, then I transfer the game to my 500GB Seagate and i started freezing again !!!
so yea, if the speed of the disc plays a part and work better on slow disk, I should just stick to my slow 32GB sandisk usb stick !!