short sporadic misfires in the title reproduction of sd card

[pam030]

I use Spotify Premium and have a problem with playing my offline stored music from a mobile phone. As cell phone I use a Samsung Galaxy S4 with Android 5.0.1. In my phone is an microSDHC Samsung 64GB card. My problem is that it always comes back to irregular unsightly short interruptions during the play of a song. The Spotify app that I use is always the currently newest from the Play Store. I`ve also tried all quality levels Spotify offers. Has anyone the same problem and possibly a solution ? I hope you can maybe help me with my problem.