Hi Peter. I spoke at the 2017 & 2018 AADMM conference about digital security. You can download my presentations from http://lyskawa.net/aadmm/aadmmconference/ if you were not there.
I use SecureSafe for my personal password and secure file storage. I choose them primarily for password management but I use the files storage for digital storage. I like them because I believe the Swiss privacy law and European laws in general are stronger than the US. They employ zero knowledge storage, which means they do not have a password reset function (I discussed this in my talk). I have the data inheritance feature enabled. In case of my death, a trusted contact can initiate the transfer of my storage documents to the person I assigned to manage my affairs. Make sure that whoever you pick, they have a feature like this