It seems to me that backing up music production online is still way too slow/expensive to make it worthwhile. It'd rather pay $150, get a 3TB drive, and manually backup at the EOD. In fact, I do. I have multiple drives. It's quick, I don't need to run any apps. And it's $150 that will last quite a while, rather than a subscription.
I have a paid account on Dropbox that I use to send clients files. That works fine. I have enough space to put up full-quality 44.1k WAV files for a CD or whatever if needed. Good enough. But the upload speed of anything more than an MP3 isn't good enough as of yet. Just my experience!