Review on SAMSUNG 128GB EVO Plus UHS-i Class 10 Micro 📸 SDXC Card (MB-MC128D) with Adapter - Up to 80MB/s Speed by Chris Burks

Works great. The weak point was the USB connection of the music source to the phone. So. Tip: Put all your music or data in the case and transfer it without USB if possible during the initial setup. I had problems when I took out the card to add albums a second time. (This messed up my settings and the file structure on my phone.) If you use USB to write data to your device, it will be slow, but it won't corrupt the file structure on your "Samsung" phone. If you have a non-Samsung phone then this might not be an issue unless it's an Apple phone as you don't have upgradeable storage so you're screwed.