Horizon sees only 350mb space left on my hard drive

As stated above, my Horizon sees only 350mb space left on my hard drive.
It has 92.3gb free sapce, I want to install FIFA 15 to it, how come I see only 350mb free space left?

Can anyone help me please?
I don’t know if it is allowed but I have Skype aswell if someone can help. Thank you all.

Because that isn’t your HDD, that is a flashdrive and at most xbox lets use some small amount like 16gb even if it is 500gb. You also can’t just install games using Horizon.

I first installed it with ISO2Gods, and then tried to put it with Horizon, my hard drive is configured with my xbox 360.
I got FreeStyle 3, picture:

It is still not correct? Could you help me out?

You cannot install games with Horizon, you also need a JTAG or RGH.

Closed.