Prime 4 cue and play not responding

hi recently i bought a new prime 4 now the cue on channel 1 is not responding straight away, also the play one second channel mixer is not responding on point either.

i did by a 128 gb sandisk for 60 nzd am wondering if flash drives cause some sort of confusion and should i upgrade to a better one. does it make a difference?

if not then what can i do about the lag response?

does anyone know of a place i can repair this in NZ?

Is quantize on and on set a long value in preferences (like 1 or 4 beats?