Midi File Export

I am new to Cubase. As a quick background , I create my songs on Yamaha PSR SX 600 - I take the midi file for that song and the edit on cubase . How do I now save and export this midi file to play back on Yamaha. When I do this currently and play back on Yamaha it does not read the new changed midi file . Looking to get some inputs . Thanks

Exporting MIDI Tracks as Standard MIDI Files