You asked me to post about the problems I've been having with sync. It started with me trying to sync a top folder - for example Music - and I set that to sync to the root of the storage, assuming it would create the Music folder and then upload everything underneath it. However, it didn't, it uploaded all the next level folders directly into the root, so I had tens of folders rather than one neat one.
The next time I came to try to solve the issue, I found how to make the sync work to a top folder, which was great. Unfortunately somehow, in the process of trying to move the existing next level folders into the Music folder about a thousand files ended up in my trash. My system locked up and I had to restart it, which may have been the problem, but whatever caused it, I just need to restore them and then move them into the top folders. I was trying to do it as quickly as possible and moving lots of folders at once, but if I have to do it one at a time, at least I should hopefully only have to do it once.