Duplicate Detection
Cryptographic Duplicate File Finder for Mac
Never risk deleting unique files based on filename alone. DiskWarren uses a three-stage progressive filter ending in full cryptographic SHA-256 byte verification to guarantee zero false positives.
How 3-Stage Progressive Filtering Works
1
Exact Byte Size Bucket Matching
Files that differ by even a single byte are excluded instantly without reading disk blocks.
2
Chunk Header Hashing
For candidate files with identical byte sizes, the first 4KB chunk is hashed in memory to filter out dissimilar media files quickly.
3
Full Cryptographic SHA-256 Verification
Candidates passing stages 1 and 2 undergo complete SHA-256 byte-by-byte digest calculation. If hashes match, the files are mathematically identical clones.