I searched for the service manual and user information. Here is what you need to know regarding a "solid piece" (likely meaning a complete, single-file PDF).
Go to Google and search exactly: "Samsung CDU30" filetype:pdf samsung cdu30 pdf
Then check the first few results from Manualslib or similar manual aggregators. I searched for the service manual and user information
The Samsung CDU30 is an older CD-ROM drive (likely from the late 1990s). Samsung no longer hosts drivers or manuals for this model on its official support site. samsung cdu30 pdf