Can you please share your backup strategies for linux? I’m curious to know what tools you use and why?How do you automate/schedule backups? Which files/folders you back up? What is your prefered hardware/cloud storage and how do you manage storage space?
You have loads of options but you need to also start from … “what if”. Work out how important your data really is. Take another look and ask the kids and others if they give a toss. You might find that no one cares about your photo collection in which case if your phone dies … who cares? If you do care then sync them to a PC or laptop.
Perhaps take a look at this - https://www.veeam.com/products/free/linux.html its free for a few systems.