As you have noticed from the above Disk Drill review - Disk Drill Basic Free .vs Disk Drill Pro. It's clear that Disk Drill doesn't have a free data recovery option for Mac users to undelete files, recover data from Mac or external storage devices. You can only use Disk Drill Basic to protect or back up data for free on Mac. But for real data recovery, you will need to upgrade this software to a pro version by purchasing a license. If you need a 100% free data recovery utility for Mac, EaseUS Data Recovery Wizard for Mac Free Edition is capable of helping you bring all lost files back with ease.