The Fibre os is amazing! Unfortunately it only has 3.5gb of space.
Which sucked because I have a 32 GB usb and my USB is only able to have one partition on it...
...or so I thought.

All you need to download (on your Windows PC) is "MiniTool Partition Wizard" from here: http://download.cnet.com/MiniTool-Partition-Wizard-Home-Edition/3001-2094_4-10962200.html?hlndr=1 (its free).
This will allow you create an extra partition to store more data than the Fibre os has.

Here's how you do it:      - Note: Do this after you have put the OS onto your usb
Open up MiniTool Partition Wizard
Right click on the allocated space in your USB and click create.
It will warn you that windows won't be able to see the partition. Click "Yes"
Name the partition label something suitable such as "Storage" and change the Filesystem Type to "Ext4".
Make the partition size as big or as small as you want. (It defaults to the largest size)
Then click "Ok"
Once you have completed these operations you will need to click the tick in the left corner with "apply" under it.
A window will pop up asking you if you want to apply the changes. Click "yes".
Your computer will now create that new partition (it'll take a while). When it has finished close the Partition Wizard and shutdown your computer.

Now when you boot the Fibre Os you can move files onto the other, much larger partition.
You also might want to run "sudo apt-get install nautilus" in terminal to be able to browse your files easily with the program that gets installed called "Files".