Paperless-ng (https://github.com/jonaswinkler/paperless-ng) is the way to go. I have an instance of it running on a RPI 4 and a network attached scanner. New documents that I need stored are either immediately scanned using the app on my phone (And its free software, get it from FDroid) or via the actual scanner which obviously gives better quality.

Paperless then OCRs the documents and stores the original and a PDF/A version for long term archival. It learns from my tagging and classification and auto classifies them in the future.

The web interface is also pretty slick and allows you to do full text search on all your documents really fast.

Tagging and categories is also a more superior form of organisation than simple folders.