I have a problem exporting the mpc file

hi, so I have a problem being a beginner regarding the use of the mpc I can't understand why when I go to save a beat or a song on the mpc and then transfer it to a usb stick the audio is reduced, i bass drops like there's no more rumble than the 808 and then I often hear the "S" on recordings. now I would like to understand why this happens when I hear very well both from the headphones and from the mpc speakers, I only see this problem when I save the song.

As i mentioned you are over-driving your output signal. its not noticable on the mpc while producing cus the mpc has more dynamic range than an mp3 or 16bit pcm. make sure all your program levels and master volume arent redlining. Compression helps to glue it all together beyond that.

I‘d rather suspect the output rendering doesn‘t include effects (and whatever processing you applied), so it‘s a mix of the raw input signals.
Check the options for file saving.
A 16bit file has WAY more potential dynamic than any current (airplay) track will expose