Smart Folders are a terrifically powerful and underused tool in the Finder. Select File > New Smart Folder, and you can create a set of criteria that produce the results right in the window for actions that include selection and deletion.
However, when you save a Smart Folder if you opt to leave it out of the Finder sidebar, it’s dropped by default into a Saved Searches folder. That folder isn’t linked by default anywhere. If you remember the name, a Spotlight search can find it again.
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