External hard drive big enough to hold more than the entire memory of the computer. Keep everything you find valuable at least, or better yet back up the entire computer on there and update it regularly. Leave it unplugged from the computer between updates.
In other words, an offline backup of everything on your main computer.
Follow the 3-2-1 rule: 3 copies, 2 different mediums (second HDD + thumb drive, DVD-R, tape if you’re nerdy, etc) and 1 offsite (cloud, VPN tunnel to someone else’s NAS, etc)
“if it doesn’t exist in 3 places, it doesn’t exist at all” is an adage I do my best to abide by. I lost a 500mb hard drive in the 90s (oh no…all my funny Sound Recorder clips and funny pics!!) and have been paranoid ever since.
Digital storage is just too cheap nowadays to risk it. Cloud storage, too
What are you all backing up? My SSD is just my OS, some programs and Steam, a fresh install without a backup has me back up and running in about 2 hours.
Some people have families and like to keep pictures and videos of said family around. Also, legal documents, academic papers, career and work related documents. Other deranged individuals have collections of rare stuff like music, games and movies that aren’t available on digital platforms anymore. Wild concept, I know.
Oh goodness… 60,000+ pictures I’ve taken with my camera, my collection of flac files, movies, shows, photoshopped images, screenshots, and random files that might stop existing on the internet!
When I was younger, heaps of hentai. Many heaps.
I have 16 TBs of photos/books/comics/movies/shows/games/etc. That’s not even that much compared to some people.
The important things for me to back up include:
- photographs and family videos (literally irreplaceable)
- legal documents and other such paperwork (can be replaced, but it would be a pain)
- various notes on how to accomplish occasional tasks (not too hard to figure out again, but it is convenient to spend 1 minute copying a command out of a text file instead of spending 15 minutes to find all the correct command line arguments)