I keep over a terabyte of photo files on my main desktop (the main drive is 8TB and the Synology NAS is 24TB). A full backup on Onedrive would absolutely be a cost option, in addition to taking about a week and a half to complete with my terrestrial microwave service. I have to work hard to avoid MS forcing me to put stuff on Onedrive.
I have actually acquired a new computer to replace my existing photo computer, which is a Xeon workstation-class computer from about 12 years ago. My problem is that I have to move over the 8TB drive and the video card, making it rather challenging to figure out how to port over the installed software. I also have to make sure I don't lose my Firewire port so that my Nikon film scanner can make the trip to the new computer. I will, I'm sure, have to reinstall everything, but then I risk losing a large library of custom setups and tools. I've been stuck on that for several months now. Once I cross that hurdle, I'll probably repurpose the old computer for use on the electronics bench--it will need to run some old software and for that I'll probably use a VPN to keep it as safe as possible for limited excursions into the internet. I may even have to install an old XP as a virtual machine. That will be a project.
My Win10 laptop is another problem. I do not have any need for a new personal laptop, and I despise the affordable options like the Lenovo my wife uses. My old Dell is fine for what I use a laptop to do, so I'll probably try to use the bag o'tricks to get MS to update it to Win11.
My audio laptop is a Win10 cheapie that I can attach to the LAN but not to the internet. But probably everything it does can be done in a Linux distro of one sort or another, much as I don't like messing with Linux.
Rick "and then there's the terabyte of photos on my wife's desktop, which is already a Win11 box--but she doesn't edit much" Denney