HDD space

We need to be aware of the size of games though. Master Chief Collection itself comprises 60GB worth of storage space. Also depending on some of the other games out there you could be looking at somewhere between 20 - 40GB worth of space taken up. 6 games
could theoretically take up 50% of the space available.

Thanks Yapper. USB 3.0.

If you delete games they will always be available for redownload if you choose.

Sorry made an error in that post. A total of 69GB is lost in translation, not 71GB. Too late to edit now.

A 1TB hard drive is around 931GB when formatted, so you can subtract 71GB straight away. This 69GB wasn't actually lost, in fact, it was never there in the first place. Computer systems and consoles see 1TB in its exact binary form of 1024 Gigabytes, but
manufactures use the decimal calculation when sizing these devices, which means when the system looks at them they appear to have lost space. http://en.wikipedia.org/wiki/Terabyte

So, in actual fact, about 127GB is being used by the console. What is also a fact is that the OS or OS's of the Xbox One are not over 100GB. A fresh install of Windows 8.1 is a little over 20GB and it is highly unlikely the system OS is larger than that,
even with three of them, of which one is a hypervisor, linking the other two OS's together.

Same thing with the console, some of the Hard drive space is already gone the rest is taken up by the three OS's running on the One. The larger the Hard drive the more space that seems to disappear into a void.

This is the best I can explain it whist at work.