Nikon D3400 has no mic port? Best alternative to record audio?

Nikon D3400 has no mic port? Best alternative to record audio? - 1

Get an external audio recorder. Zoom H1 is under $100. You will need to lay in the audio track in post processing and synchronize it to the audio track from your camera. Or, sync by clapping which ensures that the audio matches lip movement precisely.

Tascam, Zoom, and Sony make good portable digital audio recorders.

Many people are using one or another of them.