KA7EII
Got two of these - one for our Samsung Galaxy Note 10.1 tablet and one for my Samsung Galaxy Note II cell phone.  Both devices had no problem recognizing the new 64gb cards.  Couldn't be any easier to use.  Nice to have a large amount of storage on both devices.  The easy to open packaging was a real treat.  I did not use the adapters as I just connect my phone and tablet to my laptop via USB to transfer music, photos and music.