To check for duplicate files (including photos) on an Android handset, you can use Files by Google. Open up the app, then tap the Clean icon on the toolbar at the bottom.

Storage running out on your computer? You may have duplicate files. Here's how to find and delete duplicate files on a Mac or Windows PC.

A good duplicate file finder will help you reduce your digital junk levels. It can search for files with the same name, the same size, and/or the exact same contents.