Like most of the people who bought this phone, I desperately wanted to upgrade from 8Gb of storage to 32Gb. I just got my Sandisk 32Gb microSDHC card in the mail yesterday, and I have no idea why I'm having trouble getting it to work.
1) Reformatted the card
2) Put it in the phone, verified that it was being detected
3) Took the card out
4) Copied everything from my old card to the new one exactly as it was
5) Put the new card back in
And, even though the card is being detected, I can NOT launch games or applications that are stored on the card. Everything just shows up as the the green Android logo and does nothing when I click on it.
I don't know if it makes a difference, but my Xperia PLAY 4G is rooted.