Ever wanted to upload a lot of data to OneDrive without having to sync that folder to your local machine (updating my music library is pretty hard, as to put data into the folder, I first need to sync it locally).
Ever wanted to download a few specific files from OneDrive without syncing them first?
Ever wanted to operate on your OneDrive files as if they were real local files?
That is all possible! The trick is to mount your OneDrive as a Network Drive. The trick is pretty simple and is explained here. The only thing I have to add to it is that if you're using 2-Factor Authentication (which you should), then you'll need to generate an app-specific password.