If your system has a CD or DVD writer, you can use GNOME Files to burn CDs and DVDs. If you want to burn an audio CD or need more control over the result,
Open GNOME Files.
Insert a blank medium.
Find the files you want to add to the medium and drag them to the sidebar item called Blank CD-R Disc. (The label may read slightly differently, depending on the type of medium you inserted.) When your mouse pointer is over the sidebar item, a small + should appear next to the pointer.
When you have dragged all files onto the sidebar item Blank CD-R Disc, click it.
Provide a name next to Disc Name or keep the proposal.
Click Write to Disc.
In the appearing dialog CD/DVD Creator, make sure the right medium is selected. Then click Burn.
The files are burned to the disc. This can take a few minutes, depending on the amount of data being burned and the speed of your burner.
After the medium has been burned, it will be ejected from the drive. In the window CD/DVD Creator, you can click Close.
To burn an ISO disc image, first insert a medium, then double-click the ISO file in GNOME Files. In the dialog Image Burning Setup, click Burn.