It's called a 'USB Flash Drive' and can hold 'bunches o' stuff'. I have two, one is 1GB the other 8GB. All my super duper double secret stuff is kept on them (I no longer need my decoder ring) AND Kathy they come with a cord so you can wear it around your neck - even when sleeping.
/s
I’d be willing to bet the “burglar” knows about flash drives, which is why her laptop was left behind. Only taking a paper copy and leaving the computer makes it easier to convince people that this incident is just a publicity stunt.
(I hope she’s changed personal account numbers and passwords stored on her computer, because I’d also be willing to be the wrong crowd now knows a lot more than she’d like about her personal finances.)