@EpicWings You need to resize the 5Gb partition to take the rest of the 64 Gb of your USB disc. Use a live CD with System Rescue CD on your PC, boot it up, then insert your USB stick and resize the 2nd partition using GParted.

Thank you very much. Lee

@nevsan does anyone one have any advice themselves on best practices? Start with a fresh and official image from this site, decide what features are most important to you and follow the official documentation until those features are operating to your satisfaction. That's what anyone truly happy with their installation has done. 3rd party images should always be avoided, as they're loaded with configuration errors that can't be easily corrected because there's no working knowledge of how everything was set up. Not to mention the fact that the images containing game ROMs are highly illegal and only serve to damage the reputation and risk the very existence of this project.