RollScrub proves duplicate files before it touches them

Field notes

The scanner combines folders and volumes in one pass, then uses exact-size grouping, head-and-tail signatures, and a full byte comparison to separate true duplicates from visual lookalikes. Its review surface exposes both paths, file sizes, dimensions, and capture dates, while keyboard commands handle large queues. The page reports a sample scan of 48,207 files producing 1,904 duplicate groups and 214.8 GB of reclaimable storage. It also lists raw-photo and video formats, including DNG, ARW, CR3, M2TS, and INSV.