Again, I may get some who disagree, and as long as everything you have is properly backed up See Recordingtip 16 you’re technically fine. But at least for me, I’d rather have to go back and restore as few projects as possible when a drive fails. I recommend two drives per project. One master, one back up when you’re done. So as drive space is so cheap these days, it’s a likely thing that you’ll buy a drive which has three times the space you need. Whatever....I use extra drive space all the time. But the point is the same. I’ll buy several smaller drives as opposed to those ginormous terabyte drives because that’s how I work.
And while we’re on the subject, it’s really good that once a year each drive you have gets spun up. We don’t really know how long any drive will last. We just know there are two kinds of drives. Those that have failed, and those that will.