Eric Stevens
Once you look at the actual file sizes I think you will have to conclude that I am correct.

Sandman
Of course not, since you're not correct. As I said - every single image you work with in Lightroom has a 1:1 preview file created for it. Every single one. You can select when those 1:! files should expire and be purged, but if you've worked with it, or even vviewed it in the develop module there exists a 1:1 preview of the file.

nospam
that's false.

you can work with an image without ever using the develop module with it.

Savageduck
Personally, I don't use *Quick Develop* in the Library module.

nospam
that's one way, but not the only way. another is syncing adjustments over a batch of files.