Originally Posted by danielbollom
Is there any way to wipe it with magnets or anything? hahah I'm clutching at straws now, but otherwise I'm just left with an expensive paperweight so I'm trying to find anything I can :P
To be honest think twice before physically crashing your internal memory, as it may void your warranty at all.
I'd try flashing stock firmware through odin, if it doesn't work I'd try flashing anything through recovery. If both of these methods fail just leave your phone in bootloop and hope that it'll automatically destroy everything...
Seriously though, you can either physically destroy internal memory or leave it in bootloop and hope for the best, eventually send them device in current status. Up to you, because you won't have a possibility to do anything else.