This process is easy and enables you to continue keeping the photos safe. The best action to resolve this is to move Apple photos for OS 10.15 library to an external drive. If doing this is a hobby, your Mac storage will fill fast and you may experience some space problems. Whether you take pictures with your camera, compact or iPhone, you are likely to store the most valuable photos in your Mac.

Therefore, you can transfer your Mac photo library to an external drive on macOS 10.15 and create space for other work in your computer. An external drive provides more space to store documents, files, photos and music, among other things.