What is the max sd card size for the LG optimus dynamic What is the maximum size of sdcard that LG optimus dynamic supports?
LG on its website here has featured the specifications for your device, and the relevant one is:


  microSD™ Memory Slot   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;   Supports up to 32 GB memory card**


Now you can buy the micro-SD card of size up to 32GB.