Not exactly an answer to your question, but I have one folder in my inbox called "biographaphical" where I archive any personal communication, even the mundane

Not exactly an answer to your question, but I have one folder in my inbox called "biographaphical" where I archive any personal communication, even the mundane stuff, but not bills and invoices and alerts. I plan to set up something to archive that folder somewhere accessible, together with various chat logs. This is intended to be the digital equivalent of the "box of letters in the attic", which anyone who survives me and is sufficiently interested can access. I decided to do this when looking through old letters and realising that the digital era can, if we're not careful, put an end to the possibility of going through the correspondence of the deceased, which would be a real loss.