Xbox One Storage-- 500 GBs Not Enough

I recently bought an Xbox One. Initially I thought 500GBs was more than adequate, but now after installing just three games (NBA 2K14, Forza 5, PVZ Garden Warfare) I'm shocked at how quickly my storage is being used up. These files are massive.

NBA 2K14- 43.89 GBs
Forza 5- 34.32 GBs
PVZ- 10.1 GBs

Just these three games are 25% of my internal storage. Hopefully Microsoft releases 2-3 Terabyte models of the Xbox One, but if they do no doubt early adopters will feel jipped.

External hard drive support can't come soon enough.....