I have a question about the new Photos app and haven't been able to find the answer so far. I use Time Machine to back up my laptop and have always liked the idea that my old iPhoto library was being backed up there too. I now have the new Photos app, and use iCloud Photo Library with it. I had to choose "Optimize Mac Storage" because my photo library was growing so big that the amount of space I had on my hard disk was quickly decreasing. I know my photos are backed up to the cloud, but I'd much prefer to have it backed up on my Time Machine disk as well for redundancy. This seems obvious, but I wanted to ask anyway, just to be 100% sure...now that I use "Optimize Mac Storage," I can no longer say that all of my photos are being backed up to Time Machine, right? It'd just be the ones that happen to have a full-res copy saved to my Mac? Thanks for any thoughts on this.