I would go with 128gb on any device this year if you can afford it! I have a SD 64gb c10 on my S3 for 2 years now with no corruption issues. Only problems I've had is when I've dropped my phone, the card tends to slightly dislodge causing it to disconnect. Its happened 3 times within the 2 years I've had my device so far. Now, if you have apps and/or app data on your sd card, that is most likely what is causing problems for many with sd cards. Keep you apps and app data in your internal memory and your multimedia files on your sd card. If you find yourself needing to move apps and/or app data to your sd card, then you're in need of more internal space on your device.