======disk_type======
FW >= 1310
Get the file system type
====Description====
int
disk_type ( int disk_index)
====Parameters====
int disk_index: disk index - 0 for SD card, 1 for flash and 2 for RAM
====Return Values====
Disk format:
- FAT12
- FAT16
- FAT32
- EXFAT
====Example====