You can shop around for bandwidth even if you're a small shop. I run https://filepost.io. It lets you share large files and images. It is profitable with ads alone.
took a look at it, nicely implemented resumable uploads/downloads... very smooth.
i notice youre using cloudflare to deliver the files on the download side, and im guessing you are taking advantage of bandwidth alliance so ingress/egress are basically free - i always thought the biggest cost for something like this would be the storage, eg if you are letting people send unlimited <5GB files for free, and each of those last for 10 days on what im assuming is some kind of object storage/s3-like thing, surely you are paying a fortune in $/GB/month, even if its pro-rated to 1/3 the amount since the files only live 1/3 a month?
