Hi there, You will need to be much more specific on what exactly you are trying to do. - Yes, you can copy Divx files on a CD-R as "DATA" and if it fits on a 650mb or 700mb - Is it to make it play in a DVD Player that support Divx Format ? Read your manual, they might have to be on a DVD media to be played. - Do you wish to play it as a VCD / SVCD in your DVD Player ? You will need a Divx / Xvid converter, and convert them to VCD / SVCD then burn them on a CD-R to be viewed.