Hetzner for storage and traffic, Scaleway for serving additional traffic for free, to stretch the dollar further. At 5TB you probably don't need anything but the raw file system yet, but if you do want some redundancy you could add something like Gluster on top. I'm building out a video + image processing + CDN-like aspects solution on top of such a setup and plan to offer it as SaaS in the not too distant future. Idea is to make something a lot cheaper (order of magnitude?) than currently exists on the market -- for a lot of ideas and opportunities I come across using any of the non-budget clouds/hosting providers is just not feasible financially.