So morgandawn asked me to write up this guide as it may be helpful to people who:

• Create fan art that needs hosting before being able to post on ao3 or other places (images, videos, audio files etc)
• Need a place they can upload those media files that isn't youtube etc where take-downs are automated
• Is the cheapest trustworthy place I can find (like, for a lot of you this might be effectively free)
• Doesn't require training as a sysadmin to set it up
• Allows porn (backblaze just say nothing illegal, bunnyCDN specifically say they allow it as long as it's legal)