Is there a safe way to remove duplicate files from an external hard drive?

Hello Guys,
I use an external hard drive for multiple system backups and file transfers, which has resulted in massive duplicate data. Checking each folder manually is time-consuming and confusing. I’m considering SysTools Duplicate File Finder because it reportedly scans external drives, identifies exact duplicates, delete duplicate images, and ensures original files remain untouched. Before proceeding, I want to know if this tool works efficiently for large backup drives and helps reclaim storage without affecting critical backup data or folder structure.