and with data-logger for easy connecting various modules like sensors, servos, Relays, buttons, potentiometers to Arduino Mega. 
On board have micro SD-card reader/writer, for save any information from connected sensors. 
SD card interface works with FAT16 or FAT32 formatted cards. with this Shield can be saving data to files on any FAT16 or FAT32 formatted SD card.
For Card Detect (CD) and CS(control SD), you can connect to any I/O from Arduino with the jumper wire. 
You can power bus on soldering area from external power or from 5V (Arduino power)