GameStop lists Xbox One 2 TB for the price of $449.

Could it be a slimmer version of the current Xbox One?
A GameStop source told our friends at Gamespot that the store’s internal database was updated an interesting listing  for a 2 TB Xbox One model. From what we can gather, the price is currently planned to be $449 with a placeholder release date for December 31st this year.

If this is true, Microsoft is the first company to bundle a console with 2 TB of space. Currently there are 2 versions, one with 500GB and the other with 1TB, however you can use an external* hard drive and expand your games library.
The Xbox E3 2016 briefing is scheduled  for Monday, June 13, starting at 9:30 AM PST / 5:30 PM GMT, be sure to tune in.
Source: Gamespot
*External HDD needs to be 3.0 and have a minimum 256 GB.