This free open-source tool wiped out my duplicate files in minutes

It struck me how much space duplicates occupy only after I stumbled upon a full 256GB SSD drive that seemed mostly empty. It had files from old backups, cloud sync folders, and nested project directories that had multiplied over the years. Despite my efforts to carefully maintain an orderly folder structure, the storage issues kept recurring. In all this, I was constantly losing track of which file versions were current or needed.