Yev from Backblaze here -> If you have a lot of data (over 4TB) I'd recommend a local NAS or a simple Drobo to hold the data locally in addition to Backblaze for the computer. If you get a NAS we're integrated with a few NAS vendors with B2 cloud Storage so you can also have those NAS systems directly moving data to B2 as well (separate cost structure - but good stuff).

Are you saying to have a copy on the computer and also a NAS? How do you keep them in sync?

With 4TB and the price being $0.005/GB per month[0] that's $20 per month.

0: https://www.backblaze.com/business-nas-backup.html

All my data is on a Synology NAS. Can't think of anything better.

I was considering picking up one of these but they seem incredibly overpriced for the specs listed.

When you're buying a Synology you're not just buying hardware but also a pretty dang solid software suite. I've used several NAS products along with FreeNAS, Windows File Services, and plain old Samba. Synology has always been just about the easiest to use with excellent mobile and web apps for accessing your files on the go. It all depends on what you're really wanting out of your NAS.

in my experience it's really really really worth it, though.

Do you have an online/off-site backup?

(not OP) I have three of them (two off site backing up the primary) and it works great once you get it all set up!

On Windows, Storage Spaces works pretty well.

RAID

RAID give you in time redundancy, so your system doesn't fail while your working.

Most home users don't need this, it's cheaper and better to sync to a 2nd drive nightly. This gives you a local backup and redundancy, because you can swap to that drive if your first drive fails. If you're doing RAID, you still need a local and offsite backup.

How do you sync nightly? If a file is corrupted or a bit is flipped are you copying over a good copy?

I sync on linux, btrfs lets me take snapshots after each sync. I currently use rsync, but I'm thinking of setting my primary drive to btrfs so I can use btrfs sync.

I used to do this with windows. Yeah, if you have corruption, you copy it, but so does a raid? At least this way your safe from fat finger errors and you have a quick access backup.