I do have a WD Cloud and I want like to copy all the Data from my WD Cloud to my nextcloud server without downloading everthink to my computer and then uploading to nextclud. Is tehre any straight way to do that ?
If you have access to the console of your Nextcloud server you might copy the data directly to it by using scp, wget etc.
You could also mount WD Cloud to NC via webdav as external storage. Then simply copy everything via e.g. WebUI of NC. Not familiar with WD Products, but this seems helpful: