Ask HN: How can I store files securely?

I have tons of files that are of a sensitive nature, ranging from 2FA recovery codes to legal documents (e.g. contracts, employment-related stuff), copies of my passport, tax documents, financial documents, etc. Basically, a kind of digital ring binder. Right now, I keep them in an encrypted "sparsebundle" volume (I use macOS), which I tend to just keep mounted, because it's tedious to type a password every time. This means a piece of malware or a hacker could gain access via some kind of exploit, Chrome extension, etc. I thought about writing something that automatically unmounts it after a while, but I don't want to go into a complicated project. I would like a solution like so: - Allows me to organize files by folder, preferably as a real file system - Requires a password (and supports Touch ID) after some idle period - Is fully encrypted - Can be synced peer-to-peer to other devices, so I can access the same documents on my phone - Not stored in the cloud Any ideas?