It would be quite slow.
> a minimum of 1GBm
Our servers are quite dumb that if you are hosting your space with us, we need to reserve some storage space for you. That's a fixed cost for us even if you are not effectively using that storage.
Your servers not being able to account for smaller storage sizes is a technical limitation that you have built. You can take a look at tarsnap for inspiration on how to account for very small amounts of data. I’m not saying you should account for bytes, but even taking it at a fraction of what you’re currently doing would be better and fairer to paying customers. You would also discourage hoarders who thrive on utilizing a lot more and get subsidized by those who barely store much.