Music tracks only play one at a time

I recently bought a pair of Sony wireless headphones and transferred a lot of music tracks (MP3) to my Sandisk wireless USB stick.

I have Sandisk connect drive app and find the music files all there and play on my Samsung S8. Problem is they don’t play continuously, I have to contantly going to the app and pressing play.

The same USB stick works fine in the car.

What am I doing wrong?

The problem may be with your phone. From what you said, you need to get your phone checked.