potofsoup

Image and large file hosting on the cheap with Backblaze B2:
https://absolutedestiny.dreamwidth.org/190827.html

(There's a lot of context at the beginning, and the last 3rd is totally optional stuff, but the middle walks you step-by-step through the process of uploading and finding the file link. If you're looking for a quick walkthrough, start at where it says "Part 1 - Storing the Files on the Cloud with Backblaze B2".)