https://www.cleverfiles.com/help/scanning-faqs/
User in Recovery Mode:
https://www.cleverfiles.com/help/disk-drill-recovery-mode.html
UTILITIES > Terminal
Execute the following command in the Terminal:
• Disk Drill 5
sh <(curl http://www.cleverfiles.com/bootmode/boot.xml)
• Disk Drill 4
sh
sh <(curl http://www.cleverfiles.com/bootmode/boot4.xml)