Tru is a free photo/video organize assistant that helps you to keep your memories organized in one place.
Trusted by users in 130+ countries.
If two of your source folders contain the same photo/video file, Tru will ask you to either save it in the 'Likely Duplicate' folder (created within the destination folder) or keep it in the source folder itself.
You can choose either of the two options from the settings page. See the image below for reference: