Space issues with live persistent f20?

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I dedicated 50 gb to my live persistent OS but I get a message from it saying I only have 60 mb left. When I go onto disks the FAT partition is only 10% full. So I have only used like 5 gb. The / folder seems to only have 4 gb dedicated to it, but that doesn't even make sense because I gave way more space to the partition. The files app says that there are multiple partitions plugged into my computer but I have only made one. Most of these partitions have the same name -- the name I gave to my live persistent OS. I just want to know what is going on here and how to use the free space in the partition I dedicated to the OS.