If anyone is becoming irritated with SanDisk about this issue, please keep in mind that it’s really not their fault. It’s Apple’s.
I have iPad/iPhone flash drives from a variety of companies, including SanDisk, Lexar, Leef, and others. All of them are affected by this iOS bug.
I went to the Genius Bar at my local Apple Store to try to get this cleared up and they had no better solution than “Wait for iOS 9.3.2.”