If you export to your hard drive, then the size of a CD does not matter at all.
I suppose to export to the HD and then burn to the CD manually by using any tool or the OS tools.
btw: What is your exact version of LR as well as your OS?
I think I was experimenting and removed the "resize" and increased the pixel size.
That was a month or 2 ago and at my age that is 2 years =LOL
eat back and checked the resize button and the pixels to 72 and all the pictures were on the disk.
I would ask :
Do the resize button and pixels control the file size of the images?
In other words, example of size : 140 pictures may be 5 mb where 70 pictures would be 10 mb.
Provided of course if the images were that high after processing.
I only shoot in RAW and my D750 is a 24mp.
I hope my question makes sense.
Usually, you don't need to care about the file size. The image size in pixel is what you need to care about.
Read here and come back if you have further questions: Lightroom Myth Buster: When Resolution Matters and When It Doesn't | Laura Shoe's Lightroom Training, Tutorials and Tips
The article related to printing but I am thinking it relates to putting in on a CD as one would if sending to a printer want the better resolution.
Thanks for your quick response and help.
The size in MB should 'never' be your concern. If you limit the filesize in export (as LR can do if you wish) this automatically lowers your image quality, maybe even dramatically, and you have no control over the quality you get. I'd look at it as a last resort.