arch installation

My name is Mike and I new to the world of linux. Recently attempted to install arch onto an old laptop. Everything seemed to be going according to the list of instructions I researched and I thought I had successfully Installed it on my first attempt!!!! Wrong! It appears I have installed it on the usb stick I used to boot? The reason I think this is because I can not run it without that stick plugged in? I have tried to research this but only have found threads that pertain to Ubuntu. Any direction to where I can find info on helping me reinstall or correct this error would be much appreciated!

Thank you