I had/have a similar problem. I feel better after physically writing on paper than I do typing, so all my journals are handwritten and filled half my closet and a storage box under my bed.

About 5 years ago, I started scanning my journals and notes. I can add tags to the scans to identify what it's about which helps when I want to find something I know I wrote about. Now, when I fill a journal, I scan it. I destroyed most of the originals but keep about a year of handwritten ones.

Most of my Journaling was anger processing and surviving abuse. The destruction of the journals was a cathartic moment for me when I first destroyed them (backyard fire pit). It was as if letting go of the journals was a symbolic letting go of pain even though I still have all the scans on a thumb drive (password protected and in a lock box).

I hope you find a solution that works for you.