Well, as a professional that have been working in the past on Backup and Contingency Plans projects for customers...... I don't use any backup software for my music.
I do it manually, 'copying' manually the music and concerts files from my main location (PC server) to my second location summer house (Other PC server there). Before I use to do it via an intermediate small USB disk, when travelling there. But now I do it directly over internet. The Second PC in the second House is always UP, as I use it also for home monitoring/automation.
Yes. it is time consuming, but I do it at the same time that I register the files in my multimedia library, details, comments, etc. in a wonderful database.......: An excel sheet.
I've been dealing with so many backup software packages in my professional days, supporting and fighting with its failures that, now, I just want to be a "normal" user that have fun with the manually collecting, classifying, copying, registering my music files.
Not using any cloud service for that.
Other considerations apply to my critical 'My Documents' files. I use Acronis True Image and another sync tool to keep more than two copies/locations of 'My Documents', apart from archival backups.