Our email account is full of memories, as well as critical data on our life, which we would prefer to keep safe. In times before the internet, we would write letters to each other, be sent photographs of loved ones by post, and receive bills, invoices and contracts on paper. The use of a letterbox over the inbox allowed us to archive our lives easily. Now, we hope that the internet and energy supplies will remain stable enough for all our critical data to remain secure and accessible. We put faith in the hope that technology will not change so much that our files will become unreadable.