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t:\music\ *.mp3 dupe:size;sha256A similar string could be used to search image files with extensions JPG in the folder T:\Camera.
sha256 is another way of asking for content, but whereas Content: reads the file (a slow and laborious process), the SHA256 uses, I think, a pre-calculated hash key of the contents.
We are asking for duplicates based on size AND content(hash).
Wise users first run the search without the SHA256 to get a good idea of files that are duplicated by size (takes seconds) and only then apply the SHA256 search term (takes minutes) rather than Content (takes hours!) Here is my result pane, sorted by Size.
28 items are found, which suggests 14 duplicate pairs (no triplets in this case)
Note with caution that first entry; generating a hash code can create false positives (unless some fiend renamed one of my duplicate copies of "Shostakovitch - Symphony No 05").
Note too that neither SHA256 nor Content: is going to be a lot of help if you have trimmed the applause from the start and end of an audio track, or edited the border from one copy of a JPEG image. Those are false negatives - I can have two copies of "Shostakovitch - Symphony No 05" that will not appear as duplicates because one has the applause trimmed.
Cheers, Chris