A deep scan often takes longer than a quick scan, as it moves across the entire SD card to analyze every bit of data. Follow these instructions to run a deep scan on an SD card using Disk Drill.
Download and install Disk Drill. Open it.
Select your SD card from the list of devices.
Change All recovery methods to Deep Scan.
Click Search for lost data to begin the scan.
Click Review found data once the scan is complete.
Select what files you want to recover, then click Recover.
Select the desired output location, then click OK.