Lightroom-Photoshop Workflow Bug!
The testing team calls this a “bug” and the devs call it an “undocumented feature”!
In either case, it is good to know about as it can cut down over 50% of space requirements when editing and saving from Photoshop.
Although the default settings in Lightroom have compression selected for the file when editing in Photoshop, when you save the file from Photoshop, there is no compression applied. This “feature” can cost you more than 50% of space per file. Here is how you can get around the issue…