Problems with external photo library
Since using my new iMac I've been having issues every time I attempt to open my photos library from an external hard drive. When I finally manage to get it to open, working on it is incredibly slow with the beachball logo forever spinning when I attempt to make changes of any kind. It's very frustrating to have a brand new computer which is actually working more slowly than my old machine. Please help.
iMac 27″, macOS 10.15