I had a Sandisk 32gb sd card when I had this phone for months and it worked great.
I ran into issues using it later on in my new phone (due to unpartitioning and reformatting it with windows since I didn't need Link2SD anymore) but a pc app made by Sandisk called "SD formatter" not only made the card usable again but it also showed faster reads.
The Commandments of Android
1) Open RAM is wasted RAM - Don't use Task Killers
2) Cheap devices are cheap for a reason. Don't expect high end performance.
3) Boot Loop = Wipe.
4) There are no viruses for android.