One annoying thing following a normal disc-based install is that that disc is your base repository. Occasionally, when you’re installing software it will prompt you to insert it. This is not new- I remember the same thing when I used Suse 9 a while back.
Solve it by simply copying the contents of the disc to a folder on your computer. Then open ‘Software Repositories’ and add a ‘Local Folder’ type pointing at that directory.