Failed to scan

Have a crashed hard drive .Failed to scan with error message "Unable to determine file system type"'

What do I do now?

Welcome to the forum.

Details of the HDD would be useful, and whether internal or external, and version of Windows.

A screen shot showing Windows Disk Management would also help.

N.B.

For future reference, this Recuva Bug forum is intended for reporting defects in Recuva