>>> The SD cards info is available everywhere free. >> Um, where? > http://www.sandisk.com/Assets/File/OEM/Manuals/SD_SDIO_specsv1.pdf > and other big makers sites. > That's the SDIO extension spec, not the info on the SD memory itself. I can find the "physical layer" spec, and I can find the SDIO extensions, but not the basic memory card info... (or maybe the physical layer spec is pretty much IT.) > FAT32 goes up to 32GB in actual implementations, though it's > theoretically capable of 2TB. I think I had FAT32 disks under W98 that were larger than 32GB... It wasn't till XP came along that windows insisted on NTFS for large disks... > MMC is also mechanically thicker, so an SD card cannot be > inserted into an MMC slot. Um, which is thicker? The physical layer spec says that there are thick (2.1mm) and thin (1.4mm) SD cards, but I don't think I've ever SEEN a thick one. 2.1mm is almost 0.1 inch, a distance us chip-monkeys are pretty familiar with! BillW -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist