How to convert Raw files to smaller file-sized DNG Files

If you ever have a use case where you need to send your Raw files to an editor who may work on it and send the Raw file with the sidecar, XMP file, then watch this video to understand how to export DNG files from your raw and that too lower resolution DNG Files.

[rattusrodney]

I use a sony a7iii. I edit in LR. I've got 1000's of raw edited pictures from years ago. If I convert those sony raw files to dng what happens to all the editing I've done if I delete the orig sony raw files? will LR recognize my editing based on the old gone raw pics? is dng smart.