Feel free to point me in a different direction if this isn't the comm for this, but I've been using a corporate cloud service (think Google Drive or OneDrive) to back up my personal files and want to move away from that.
What kind of solutions are out there so that I can back up and access my files securely from multiple platforms (Windows, mobile)? Should I think about setting up a NAS in my home?
It depends on your use case. I have never relied on cloud backup heavily only because I never got into the habit of it. For storing files I have a 1TB HDD that is hooked into a SBC at home. I can access it from anywhere because of Tailscale. So I have been using that. I do need to set up RAID for redundancy but I don't wanna spend money on another hard drive for now.