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This tab of the Global Preferences window provides access to advanced  Duplicate File Detective settings.




Suppress retrieval of file ownership information - File ownership data is automatically retrieved from duplicate files for display within the duplicate report (upon search completion). Extraction of this information can slow duplicate search performance, especially when scanning remote (network) paths. If you don't care about file ownership, you may engage this switch to suppress its collection (file ownership fields will always be displayed as "unknown").

Compress temp files created by this product - Duplicate File Detective creates temp files in the current user's temp folder (or system temp folder, if not available), the size and quantity of which are determined by duplicate search project scope. When enabled, this setting applies NTFS compression to those temp files, significantly reducing the amount of disk space they consume. Such compression infers a minor performance penalty. Supported on NTFS file systems only.

Use low-priority disk I/O for scanning & hashing - When enabled, allows operating system to prioritize other disk I/O requests over that of Duplicate File Detective. Requires re-start to take affect.

Number of threads used during file content hashing operations

oSingle threaded - Recommended for scenarios where you need to limit disk I/O.

oAutomatic / adaptive - Based upon analysis of host computer system resources and project configuration. This is the default.

oUse this specific number of threads - Allows for fine-grained control over thread allocation.


Tip: Multiple file content hashing threads are generally most effective at speeding up duplicate file comparison operations when the current project is configured to scan multiple, discrete volumes (e.g. paths spanning multiple physical disks or multiple network paths).




Maximum image preview file size (in KB) - Image files selected within the report detail view will be previewed only if their file size is less than what's defined here. Default value is 102,400 KB (100 MB).

Enable Unicode support when creating zip archives - Allows for the creation of zip files that support Unicode file paths. Before engaging this option, be sure to confirm that any archive processing applications you might use to open these files also support Unicode.

Apply NTFS compression to qualified export files - When enabled, this option causes supported text-based export file formats (such as HTML, CSV, and TXT) to be deflated via NTFS compression.

Specify temp folder - Can be used to override the default temp file folder location. By default, the user-defined temp directory will be used. To improve performance, use the fastest local storage media available (SSDs, etc.) for this purpose.