Thanks, but this didn't really solve my problem. If you are running a service that will display IPFS content (such as steemit) then one cannot simply "avoid downloading a hash", it happens at user request.

The maximum storage size is a global amount. I wish to limit the maximum FILE size. I could store 100 GB of 2MB images but not 300 MB movies or 3MB songs.

Also I would rather not have a web request trigger a 1GB download from IPFS.