I use services app to synchro my dropbox with My Cloud Home. It was copied but do not synchronize then. Is it normal?
Yes, the data contents which added using sync clients, like Dropbox will sync down to the My Cloud Home (One Way Sync) and the data contents deleted using sync clients will also delete content on the My Cloud Home. But the data added, deleted or modified on the My Cloud Home using MyCloud.com, Mobile App of WD Discovery Desktop App will not sync changes up to the sync services. You can refer below article for further details.