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I'm trying to dual boot my Dell xps 15 with 512 gb ssd drive. I've created a boot device with a USB (Ubuntu 16.04). However, after selecting language in the installation process it says I need at least 8.5 gb disk space and that my computer only has 8.0 GB (which is the size of my USB stick I'm installing Ubuntu from). Running gparted in a live session also only shows my USB's storage, not my actual drive. Any suggestions would be helpful, thanks.