IMPORTING SPLIT FILES AS ONE FILE

I have used a GH4 for some years making now an then long recordings for up to 30 min (the limitation). I have always when imported to FCPX got it as one file. Now I suddenly get several files. Yes I know GH4 is making several files but earlier this was somehow automatically merged together in FCPX but not any longer. Anyone having an explanation to this ? Anything in the camera that accidentally have been adjusted ? In the import window it shows up as several files earlier showed up as one file so the problem seems to start already there.