It's relevant I think, but I'm not entirely sure it's on-topic for "design".
I suppose it's no more off-topic than "what font is this".
Note I'm not in a corporate environment. I'm solely responsible for the integrity of my system and viability of my files. If you are in an employment environment, this really should be a concern for an IT department, not the designer.
The important part of any backup system is to simply have it. It can be something as simple as an external USB mini-drive which you manually drag files to, then keep in a drawer somewhere. The more redundancy you can build, the safer you'll be in case something fails. It's all too easy to think you're safe.... only to later discover you've lost a ton of work.
Me.... be aware I have 30+ years of files. Lots of data. This may be overkill if everything you have fits on a single SSD or thumbdrive.
- Nightly: Backup to 2 different drives. Not 2 volumes of the same drive or 2 volumes in a single RAID... 2 separate external RAIDs actually.
- Weekly: Backup to a 3rd different RAID
- Monthly: Backup to a 4th external drive, which is kept off-site in a safe deposit box.
- Quarterly/Yearly: I don't always keep this one up to date, but I have a 5th external HDD in a waterproof/fireproof safe in my home which I will update if I remember.
RAIDs are RAID-5, they can be rebuilt most of the time, but not always, should a single HDD fail. I have had more than one drive fail though, completely trashing an entire RAID. (Which is why I don't trust Seagate or WD Green drives.)
Hard drives are cheap. Recreating years of work is not. All it takes is one time for a "single" backup to break and you'll instantly regret not being more diligent/redundant.
After experiencing disastrous losses in the past, I'd rather be overprotected than under.
Online backup tools are okay, but I find them inefficient for any large amount of data. Sure uploading to them is often not a problem. However, once you try to restore 500GB-1TB or more, you find that you need at least a week or much, much, much longer to allow everything to download.
On the Mac, I use a combination of DejaVu (scheduled) and SuperDuper (manual) for my backup tools. For a few reasons I won't go into, I do not trust Apple's proprietary Time Machine mechanisms.