could try a different memory card or saving some tracks to phone memory then removing memory card then open up music player to see if its quicker via phone
this will let you know if you have a slow card
most fakes are very slow allways etter to buy a genuine fast memory card for your phones etc
is it the genuine nokia 1?? i would think it would be ok if so
is it a genuine music edition??
or did you buy an updated normal version with a bundled memory card??