A split screen image. On the left, a red "Warning" sign saying "Low Disk Space" with messy folders. On the right, a green checkmark saying "Storage Optimized" with the Duplicate Files Fixer logo.
Duplicate Files Fixer often comes in a trial version that allows you to scan for duplicates but may limit the number of files you can delete. A (also known as a license key, activation code, or serial number) is a unique alphanumeric code provided by the developer. duplicate files fixer key new