Press Alt+F2 and enter k3b. K3b opens.

Click one of the options already listed at the bottom part of the window (New Data CD Project or New Data DVD Project) or select Tools from the menu to get a list of further options.

Use the tree view in the top left part of the window to search for the files or folders to burn. When they appear in the top right part of the window, drag and drop them into the Current Projects window.

Insert a writable CD into the device then click the Burn icon.

Enter the required information in the Data Project dialog. If you are not sure which settings to choose, click K3b Defaults. This should work well for almost all files.

Click Burn.