Charles is noticing several of his recent photo files aren't as large as they should be on his Mac Mini. Leo says that if Charles is using Apple Photos for an App to store his photos, to r/c on the photos library, and then select Show Package Contents, he'll see photo folders, including the "originals" photo folder. That'll verify his originals are there. But in the settings, there's a feature called "iCloud Photo Storage," and Optimize drive, which will take the higher resolution images off the computer and store them in the cloud, and then replace those photos on the device with smaller JPG files. So if he needs the larger photo file, he can go to iCloud and download it.