Delete files from Garageband?

How do I delete unwanted files or unwanted projects in other words from garage band? Sorry if this is a real obvious one but everything i try seems to not work. From finding the file and right clicking to put in the trash or trying to drag said file to trash, nothings seems to work and I have like 15 projects i need to get rid of.

Also, how do I redirect my Garageband saved folder into a new folder? I have an external hard drive and I want to start saving all of my garageband stuff onto it instead of the computers internal hard drive. I know that you can do this with iTunes so there has to be a way to it with GB. Any insight would be greatly appreciated.