Memory interfacing modules

What's the maximum supported capacity of the micro sd card? also how fast should the card be?

http://bigbelectronics.in/product.php?product=micro-sd-tf-card-memory-shield-module-spi-micro-sd-storage-expansion-board-arduino [url=http://bigbelectronics.in/product.php?product=micro-sd-tf-card-memory-shield-module-spi-micro-sd-storage-expansion-board-arduino[/url]

Good question. The SD card itself is an SPI device. the 74AHC125 chip on the board is simply a tri-state buffer.

The Arduino libraries support FAT16 and FAT32 format. FAT32 in theory can support up to 2Tb, but Microsoft crippled it in DOS to 32Gb.

I do not know if there is an Arduino library for NTFS.

So, if the files are to be read on a PC, and the SD card is formatted as FAT32, then 32Gb is your upper limit.

No clue on the speed.