Get a scanner

A scanner to keep in your RV, we scan photos and records all year.  We keep a copy on a SD card and another on a portable hard drive.  We have also emailed key documents to our kids and they to us as another back up.  We have got tired of shredding documents and keeping paper copies and paying annual fees for a bank safe deposit box

To be fair we do keep a handful of paper documents in a Walmart 8X11 (inside dimensions) Firebox/Safe.  It is about 7 inches tall on the outside.