I'm looking to get a 64gb micro SD card for my phone (Samsung Note 3 running Lollipop). The prices online run anywhere from $6 to $120. I read on a photography blog that there are speed classes and they recommended high speed for high res video. I'm looking to put my music files on it.
Is there any difference between a cheap card and a name brand? Do I need to worry about speed class for my smartphone? What about 128gb cards?
Note: I'm not looking for a brand recommendation, just what differences there might be between micro SD cards.