I have 184 photos(?) that show up in Photo Gallery that do not seem to exist. If I try to delete one, I get "The files you have selected might be read-only or in a location that isn't available." I have a NAS Hard Drive. When I try to open file location, I get the same error. It displays unavailable files "\MYBOOKWORLDPublicSildo Promo PhotosDSCN0370.JPG." MYBOOKWORLD is the address of my NAS drive. If I explore the drive directly, there is no folder "Sildo Promo Photos. I am running Windows 10 ver. 1511. I don't know what version of Photo Gallery I am running as I cannot find a way to check the version #