My wife has a 2014 macbook air with a 128 SSD. She wants to upgrade to a larger drive. I hear a lot about EFI lock, iCloud lock, pin lock and so on. My question is, If i buy a used SSD and it is in some way locked can it lock or in some way damage her machine if i put it in ? or will i be able to just put the old one back in? what should i watch out for ?