South Beach Lawyer
An excellent microSD card from SanDisk.  I purchased this to format FAT32 for use with mySamsung Galaxy Tab 3 (7-Inch, White)and, once so formatted, works flawlessly.  It never has "unmounted" on its own, it's lightning fast, it's reliable and offers plenty of storage.  Reasonably priced as well.  In fact, I purchased this on sale at my local big-box "blue" retailer with the yellow price tag for a logo for $27.99.