Write and store all in one with these USB Card Pens that have a removable 4GB usb flash drive built right in to the back end. You never know if you’re going to be going old-school with the pen or 21st century with the flash drive, so you should be prepared for both. Just don’t let anyone “borrow” this pen because we all have that one friend who suddenly has all your pens and is always asking for another one.. Pen is refillable with standard ballpoint refill. $55 in white, gray, or blue from Uncommon Goods.