Best way to auto-synchronise music between HTC One and PC
Playing with words: if you want a folder to sync, have you tried FolderSync? Should be perfect for this purpose. You can sync entire folders between your PC and your Android device, and also use different cloud storage services. Thanks to an integrated Tasker/Locale plugin (in the full version), you also can automate it to your wishes. But even without Tasker/Locale, it offers User specified sync interval or specific sync times.