MacBook photo storage optimization
I recently backed up the photos on my Mac to iCloud and optimized their storage on my Mac to create storage space. It's my understanding that part of the optimization involves reducing photo resolution, etc. If I want to transfer the photos from my Mac to an external hard drive, will the original, full-resolution photos transfer, or do I need to first re-download them from iCloud?
MacBook Air 13", macOS 10.15