On mac OS, is it safe to delete "Photos Library.photoslibrary" in the pictures folder? It was 200mb large, then i browsed through some old photos and videos from a trip in the photos app that are usually in icloud and it had to download some before viewing. now this file is 19GB large lol. so it seems like it downloaded them locally to view full quality. im not going to look at those photos and videos regularly again, so how do i delete or reduce the size of this file that is clearly a temp cache of those photos on my mac without deleting the photos on icloud?