(Almost) All electronic here!
Finances are all on-line. I’ve opted for Paperless on everything possible. I have an Outlook reminder pop up every 2 weeks to go through all the accounts (bank, work, 401k, utility, cell phone, etc). As long as I keep up every 2 weeks, and everything looks good, I see no reason to keep anything. It’s ‘water under the bridge’ and I made sure the water looks good :)
Taxes: online. There are still some paper statements necessary for taxes; and I keep Goodwill receipts etc. When taxes are done I scan it all in and toss the paper. I save the electronic tax records indefinitely…
Car records are ‘almost’ all electronic. I keep a .txt file with all car details: make/model/year/vin, modifications, major services. We do have a small paper notebook to log gas fillups. Which I never go back to look at again…. Time to chuck this one. Paper insurance card in the glovebox. Electronic insurance cards (cars and house) stored as backup.
House, church, etc records and lists are all electronic. Again I have .txt files for specific things, down to the serial number of the swimming pool pump, paint codes, and a reminder list for backpacking vacations.
Kid schoolwork is printed and performed manually. We keep 1 grade at a time. Grades are logged electronically. The paperwork is recycled at the end of each grade.
I do keep a physical folder for ‘memorabilia’: cards, letters etc from special people. At the end of each year I cull through and decide what (if anything) to actually keep. I have a few very special letters, pics, etc from my aged grandparents, etc.
Electronic backup: the home computer has a folder for each year. The home computer main drive is backed up on another monster cheap hard drive. Every 3mo I back up the folders to an external hard drive stored at work. This guards pretty well against drive failure, fire, theft, etc.
DW and I review where all the stuff is located annually; in case I suffer unexpected disability or decide to run away to the circus.