There’s no doubt that a NAS is great. it’s just too slow for me because I’m OVER paranoid about backups.
I have lost drives too many times. most recently I lost a hard drive during a move that cost me literally 7 years worth of data. Photos, photoshop work, entire website sources etc. it devastated me. but it was all my fault.
After those lessons I’ve learned to over do it. it’s better to have too many backups than not enough. Now my system drive is RAID1 (mirrored) and my data drives are RAID5. I do images of the PC every week for full images, and incrementals every 2 hours with acronis. by doing them so often it takes virtually no time, or resources. I never notice it.
But I’ve gone through tons of drives. My best experience is with Seagate. Barracudas are what I use now. Seems like I’ve had more wd drives fail than anything, but I’ve had more WD drives than anything so it makes sense.
I think, since drives are so cheap, there’s no excuse not to have backups of everything. Just like RAM is so cheap theres really no reason not to have 4gb.