Hey thanks for reply, and wow I never tried key 4!
Key 1 only take you from the playing a song screen back to the main screen, then when I click files it goes back to a sub folder, not the main folders within 'music'.
If I click Key 4 when playing a song it starts it from the beginning, but if I click the centre button playing a song it takes me to the sub folder, if I then click key 4 it takes me back to the folder before the sub folder etc
So basically I'm sorted!! I expected key 1 would get me back to everything but clearly not, I'm sure years ago I must have changed rockbox version and this happened, I don't believe it was always like this, but it's been years since I've used rockbox
Thanks very much, a big help