Hi, welcome to justanswer.com! My name is Mike.I am going over your question and will be with you shortly.
For a data disk:
1 - select the photos to be burned to disk and export to a folder on the Desktop File ➙ Export ➙ File Export menu. Set the Kind = what you want, the original file or the current, edited version.
2 - insert a blank DVD in the optical drive.
3 - drag the folder of photos onto the DVD disk's icon.
3 - drag the DVD disk icon to the Trash Bin in the Dock which turns into the Burn function:
Do you still want help?