My German is non-existent and Google Translate sort of translates your question to: "Today my new DL4000 put into operation and set up as a RAID0. Unfortunately, I can not larger files, such as. Do not save a Blue Ray in the Shered Videos directory as it will always return the following message: WDMYCloudDL4100_Public is out of memory. The box is completely empty !!! Small files eg. 3GB no problem.
So it can only be a matter of ice. I would be really grateful for your help.
How are you writing your files to the DL4100? What sort of computer are you using? Are you using WebDAV, SMB, FTP or some other method of writing files to the NAS?
We need more exact and accurate information to be able to help you.