Disk Xray 2.8.1 -

The software is built with five independent modules that can run simultaneously to improve multitasking efficiency:

: Uses a byte-by-byte comparison algorithm to identify 100% exact duplicates of photos, documents, and videos. Disk Xray 2.8.1

While you are specifically interested in version 2.8.1, the software has evolved significantly. According to the Disk Xray Version History on the App Store : The software is built with five independent modules

: Was a maintenance release focused on compatibility and stability within the 2.x branch. Disk Xray 2.8.1

: Completely removes applications and their hidden leftover support files, caches, and preferences that manual deletion often misses.