Not surprised to see this. Apple has had issues with cords falling apart for years(power adapters, mice, iPod cables).
mine did the same with barely any use...
Jeez mine is too. Is Apple very generous when it comes to exchanging them for new SD drives?
The box adds much more bulk. I'd venture to guess Apple should get their crap together on this. I don't plan on keeping mine in a box the entire time. It's going in my bag.