[ubuntu] Can't install Ubuntu because I don't have enough free space.

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http://ubuntuforums.org – Hi there. This is my first post and my first day using any Linux based operating system. 2 days ago I dropped my HP Windows 8 laptop. I got the error: "Boot device not found. Please Install an Operating system on your hard disk. Hard disk (3f0)." So I couldn't acess any files or the OS, So I went on my sisters computer, reasearched and learned about Ubuntu. SO I saved it to a disk ad loaded it. But when I tried to install it, I had it connected to the charger and the Wi-fi, however there was not enough free space to install it. How do I view and delete files from the "Try unb (Hardware)