Why the same photo's file size different in Photos and in the Finder?

I have a photo size 4608 x 3456. When I open the file information in the Apple's Photos app, it says that the file is 7.8 MB. When I open the same photo in the Finder and look at the news file, it is said that it is 3.1 MB on the disk. Why does this happen? All other metadata is the same in the pictures, Finder, Lightroom or Photoshop, but I can't understand why the file size seems to have changed since I dragged photo pictures to the Finder.

Thank you.

How you view the photo in the finder (you shouldn't be messing around inside the photo library)?

If you export or drag / drop you create a new file with a different compression - using export allows you to control what

LN

Tags: Mac OS & System Software

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