I agreed with SandDisk Guru “drlucky” You have to buy micro SD card to an authorized dealers in your area. Keep in mind that every SD Card has microcontroller that can be programmed so must have to know SD specs before buy another one.
SDSC or SD: up to 4GB
SDHC: upto 4GB - 32GB
SDXC: upto 64GB - 2TB