I've been using Crashplan for a few years now. Currently at about 2.1 tb (mixture of music, pictures and personal stuff). Initial upload of course takes time - but well worth it.
Also use Crashplan free on several computers (one in Sydney Oz) to backup to my server (which then gets backed up to Crashplan Central).
At times I have had to restore specific files/folders - worked perfectly.
I'm paranoid about security so use encryption - with super strong key.
Tried other cloud backup services, Crashplan was just the most easy to use and robust. One service I tried failed miserably with restore simply not working (the company said something must have been wrong with how I did things - which was an outright lie).
Ed
Current: [P20] Roon/Tidal > Custom PC> Chevron Paradox NDF16 > Phast Pre > Neuro. 686 > Tannoy Berkley (RFC tweaks)