Yesterday I posted the ultimate upgrade if you wanted more storage and speed. But what if you just want storage space, and want to haul around USB sticks and have dem occupy your USB slots. The answer is simple, buy the Nifty MiniDrive.
The MiniDrive is the elegant solution to a stupid design choice by Apple. The SD card slot cannot contain the whole SD card and thereby the SD card will be damaged, if not removed from the SD slot before throwing your MacBook in your bag.