Here are a few things I know!
1. 32gig card is 16 dollars for class 4! I know it's not as fast as class 10 but it still does the job.
2. Root your phone and you can move stuff to your SD card. If you need to store something that is going to be accessed often get a class 10 card! You should root to delete bloat anyway!
3. You cannot merge space off different partitions, SD cards are a mounted external storage on your phone with a different address. The on board storage of the phone is at a different location!
Is it bad that I like code???