This may be a bit of a review for some of you. On occasion you may need to know the size of a file or folder. This is not difficult to determine in the macOS, but there are a few settings that may be helpful.
When it comes to the Finder, I am a Column View man. I have been for many years. However, there are some reasons for using List View. Determining file and folder sizes is one of those reasons. If you want to do a one-off to find the size of a file you can use the Get Info command in the File Menu or Command ⌘ + Letter “i” keyboard command. The Finder will show you a window like this:
You can see the file size, Permissions on the file and a few other attributes. However, if you want to get an overview of a bunch of files and folders, then the best way to do that is to switch your Finder to List View:
Click on the little icon to the left of Column View and you are in List View:
As you can see, List View shows you the File Size. If you wish to see Folder Size you have to open the Finder “Show View Options” window:
Once you are in that window look for “Calculate all sizes” and check it:
When “Calculate all sizes” is checked, you can see the Folder Sizes as well:
When I am finished using this method to find File & Folder Sizes I always revert to Column View. That is just the way I roll.
So, this is no big deal. If you need to determine the size of one file, use Get Info. If you need to determine the size of multiple files and/or folders, go into List View.