Why not just use Amazon Glacier directly?
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.
Disclaimer: I'm the founder of deepfreeze.io.
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.
Good luck with deepfreeze.io!