Worked for awhile and then android would blow chunks (unexpectedly removed).  Windows sometimes could not read them and just blew up explorer.  Formated FAT32 .... ect ect ect over and over.  I'm done with SanDisk.  I think the problem is the CLASS 10 part of these cards.  All other cards I have work fine and they are less than class 10.  Maybe this was a bad batch because my replacement card a few days later (from Amazon) did the same thing again.EDIT: Decided to pick up the card that was laying on my counter for the last 3 months and give things another try.  Still does not work in HTC Evo LTE or EVO 3D.  Finally got it working in Galaxy S3.  Still very frustrating.