Monthly space refers to the amount of files you can upload each month. Bandwidth refers to the amount of traffic your page and podcasts receive within a month. Each plan has a different allowance, we recommend that users choose the most suitable plan for their needs and to cover expected growth on their podcast in the future.
We now offer unlimited audio and video podcast plans, so you don’t have to worry about outgrowing your space or bandwidth. Check out http://www.podbean.com/podcast-hosting-pricing for more details.