FFmpeg not found

I installed FFmpeg to the default location, it could not be found. Then manually located the .dll, still said cannot be found.

I am using Audacity version 3.0.2 on Windows 10

Audacity 3.0.2 requires the older “32-bit” version of FFmpeg.
If you wish to use the newer “64-bit” version of FFmpeg, update Audacity to the current 3.1.3 version (available here: https://www.audacityteam.org/download/windows/)