Google Photos has identical duplicate detection, which means that if you have uploaded photos to Google Photos already, it will not re-upload the same photo. The de-duplicating feature will check/scan to see if they have been previously uploaded (each photo file has a unique “hash” that allows us to determine this).
Google Photos has a feature that recognizes duplicate images and doesn’t save them. The feature is supposed to work even with files that are named differently and that are located in different folders. However, Google Photos can’t always detect near duplicates and will upload them.
If there are already duplicates in the cloud, Google Photos should give a function to search out all duplicates and delete them. This actual duplicate detection can exactly detect files of the same content but in different file names, different upload dates, upload by different clients, upload from different local devices, etc.
However, most people don’t want a duplicate photo of every event taking up their limited cloud storage. Luckily, there is a way to delete duplicate files, even if you’ve edited them and there are too many to search manually. The biggest cause of duplicate photos is that the user uploaded them twice.
Does Google backup have identical duplicate detection?
Google Photos Backup Has Identical Duplicate Detection Google Photos has identical duplicate detection, which means that if you have uploaded photos to Google Photos already, it will not re-upload the same photo.
Why do I keep getting duplicate photos on my phone?
Using a new phone, new computer or reformatted computer (reinstall/upgrade OS, photos backup app, etc.) may also generate duplicated photos. Bugs can also create duplicate photos in your Google Drive.
Sometimes, when you add a new device to your Google Photos or enable the “backup & sync” feature, it will upload a file that is already in the cloud because the two pictures have slightly different metadata.