my friend wants to bring his ps2 memory card to my place so we can play kingdom hearts at my house on his progress. is this safe? will it erase mine or his progress? if he come and his stuff got deleted he would be furius. i want to make sure its safe before he does it. please answer.

It's fine, I'd just unplug your own memory card so when you save you don't over write your own file.  I have different KH files across 4 memory cards. 

Just have one memory card in the ps2 at any time if you want to play it safe. It won't overwrite anything.

It's fine, I'd just unplug your own memory card so when you save you don't over write your own file.  I have different KH files across 4 memory cards. 

thx.

 

p.s. you playalmost as much kingdom hearts ias i do.

It's on a different memory card, so long as you don't have your memory cards in, there's no danger of saving over anything you shouldn't.

Nope, it's perfectly harmless.  My friend and I take our memory cards to each others' houses all the time without a problem.