False duplicates occur when identical files appear unintendedly in a system. Antivirus software might create them when quarantining suspicious files, sometimes leaving copies alongside the original after cleaning. Sync software can generate duplicates during conflict resolution, like when it fails to merge changes from multiple devices and instead creates multiple "resolved" versions to preserve all data. This differs from deliberate backups or saved versions.

In practice, an antivirus scan might isolate a file for investigation, restore a cleaned version, yet leave the original flagged file behind — resulting in two identical files. Sync tools like Dropbox, OneDrive, or Google Drive often create copies (e.g., "Document (conflicted copy).docx") when users edit the same file simultaneously from different devices and conflicts aren’t resolved automatically. Users in collaborative environments or across multiple devices frequently encounter this.

Advantages include safeguarding data during scans or conflicts. Key limitations involve wasted storage, user confusion, and risk of incorrect file selection. This erodes trust in automated tools and complicates workflows. Future developments aim to enhance conflict-detection algorithms and clearer restore procedures by antivirus suites to minimize occurrences. Careful configuration of sync settings helps users avoid these issues.