This is only the amount of free space you need to install the update - not how much space it will take up. Plus, dont forget you have SD card expandable storage, and the recovery partition can be removed - which I highly reccomend before you update you create the recovery drive, without you could get screwed if the update doesnt go to plan. I didnt have any issues, but have read that some have had issues. Be patient when installing, it will take probably 1-2 hours to do it through downloading, installing, rebooting, etc.........its so worth it. With 8.1, this device rocks.