If you are an expert user and don't mind the technical complexities (keys, buckets, etc.) and the complicated (close to unpredictable for most) pricing scheme, Glacier will work.
deepfreeze.io makes it much easier, and offers integrations with other services too (currently only Dropbox, more soon), that allow you to transfer files between deepfreeze.io and these services on the server side -great if you don't want to re-upload 50 or 100GB, you already have in Dropbox, over your home Internet connection.
I immediately assumed this was Amazon Glacier based when I read your post and that is nothing but an extremely good design decision on your part.
You've created a very useful product on top of very sound existing technology. You don't get bonus points from your future customers for reinventing the wheel rather than use very good existing services (and for the most part Amazon AWS services are very good).
People that claim this is basically a wrapper around Glacier do not properly appreciate the difference between a consumer facing service and the sort of services Amazon is offering.
