Review on 📷 Kingston Class4 32GB Micro SD Card - Compatible with Samsung Galaxy S3 by Loren Schmidt

No problem, just copy old card to new, install in phone. I definitely gave my phone some speed when I ran out of my 16GB card. The easiest way to upgrade to a new card is to put the old card in the adapter, plug it into your PC or laptop and copy the contents of the card to your PC or laptop. Plug the new card into the adapter and into the PC or laptop, copy the data from the PC or laptop back to the card and copy whatever you want from the computer to your phone. Put a new card in your phone and give it some time to digest it all. If you have apps installed on an external card, this could pose a problem. Make sure you can see and copy what Windows considers "hidden" and "system" files. Please remember to turn off your phone when removing or inserting a card. Great card for the price.