Okay, the PSR-E463 has a 6 track recorder/sequencer, as does my PSR-E433. I think what user_fra wants to do is take a single track from an existing external MIDI file, and then transfer that track to one of the 6 sequencer tracks on his E463, and unfortunately, I do not believe that is possible. I'll admit that I have very limited experience with MIDI, but based on what I've read about these keyboards, that does not seem to be a feature that they have. In fact, it is not even possible to specifically save or load a recording on the entire 6-track sequencer to a flash drive or computer -- you can only save a user file, which is essentially a complete data dump -- all of the main settings, registrations, loaded styles, and sequencer recordings. It's basically a back-up function, and then, you can re-load the user file into the keyboard at any time, and get the sequencer recordings in that user file back on the keyboard -- but it will also overwrite any current registrations and styles that were on the keyboard with whatever was saved on the user file when it was created. But again, no way that I know of to just get an external MIDI track and load it directly to just one of the E463's onboard sequencer tracks.
Let me clarify what I wrote above. You CAN save a sequencer recording specifically as a MIDI file, but as far as I know, there is no way to get that MIDI file, or just specific tracks of it, back into the sequencer. I believe MIDI files can be loaded into the keyboard as songs and played back on the keyboard, but when this is done, it is separate from the 6-track sequencer -- these files are loaded into the keyboard's memory, but not into the 6-track sequencer.
In reality, even if it was possible, there would be limited use for such a function, because, like my E433, the E463 has essentially no editing features for the sequencer. Once the tracks are recorded, that is it. You can turn on and off individual tracks when playing the song back, and you can delete tracks and re-record them from the beginning. But there is no way to change the sound, notes, style, effects, or even just the volume of the individual tracks once they are recorded on the keyboard.
This doesn't make the 6-track sequencer, useless, however. I've used it plenty of times to record most of a song (with the only hassle being that if I make a mistake, I have to start recording the entire track from the beginning), and then I take that recording and send it to a computer, running Audacity software (but there are plenty of other audio programs) as an audio file -- using an analog audio-to-digital USB converter connected from the keyboard's headphone jack to the computer's USB port (the E463 may not even need this converter, as I think it can output audio through USB directly). Once that recording is in Audacity on the computer, I can then record additional tracks for the song directly to Audacity to add more depth to the recording of the song. In reality, you could just skip the sequencer altogether, and just record what you want directly to the computer, but I find it easier to at least get the "meat and potatoes" of a song recorded right on the keyboard, and then start transferring everything to a computer.
As for the way that this part of the forum is labeled -- yeah, I've noticed that. They haven't updated it in years -- as the PSR-E443 is a seven year old model. They should label it something like "PSR-E200-E400 series" or "PSR-E2xx-E4xx series" or something like that, so that it is clear that this part of the forum is for all PSR-E series keyboards.