It's cheap ($5/month), simple and very easy to use. Plus, it's unlimited, and it automatically/continuously backs up all files, including those on external drives.
I love that Backblaze offers a 15-day free trial, as well. I got to see if I like it, before I purchased the plan.
I'm happy that it keeps my data always backed up & safe, in case something goes wrong with my devices.
My personal experience with the support team: they respond quickly, they are super knowledgeable and provide step by step instructions for resolving any issues.
I have been using Backblaze for about 3 1/2 years, and I haven't had a negative experience yet.
It's simpler for users who don't know what should be backed up but might be frustrating for those who don't want everything just thrown in together.
A few years ago, when I wasn't using any kind of backup solution, a friend of mine said to me "If you have all your data in 2 places, you have it at least in one, but if you have it in 1 place, you don't have it anywhere." Very true! And he told me about Backblaze.
I decided to have a peace of mind and back up all data on my laptop and 2 external drives. My laptop is for personal use, but it's a work laptop, too. So I always make sure that every clients' file is backed up. It is very important!
Backblaze has saved me a couple of times - one time, especially, for a client's important project, I had to edit part of a design, but for some reason, something went wrong upon saving the revised version. So, later I couldn't even open the file, it was corrupt. I am so happy that I got Backblaze, and that it had been automatically saving my files, as I work... Because I was able to restore the original version of the file, without having to recreate everything from scratch! It saved me and my client time, money and a major headache! Thank you, Backblaze!