found this
Two new symbols have been introduced by the SD association to clear up the confusion.
Cards with an Ultra High Speed (UHS) rate of transfer will be marked with the USH-I symbol, which is simply a capital I located on the right side of the card next to the letters HC or XC. This symbol designates the card as capable of transfer rates of up to 104MB a second.
marcel
Thanks for the explanation, marcel.
So does this mean that the Sandisk card is made following the SD Associations spec 4.0 and not 3.0?
From Wiki:
"SDHC host devices will accept SDXC cards that follow Version 3.0, since the interface is identical,[3] but the following issues may affect usability:
*SDXC cards are pre-formatted with Microsoft's proprietary and patented exFAT file system, which the host device might not support. Since Microsoft does not publish the specifications of exFAT and its use requires a non-free license, many alternative or older
operating systems do not support exFAT for technical or legal reasons. The use of exFAT on some SDXC cards may render SDXC unsuitable as a universal exchange medium, as an SDXC card that uses exFAT would not be usable in all host devices. Since the FAT32 file system supports volumes up to the SDXC's maximum theoretical capacity of 2 TB as well, a user could reformat an SDXC card to use FAT32 for greater portability between computers (see below). FAT32-formatted SDXC cards can be used in a host device built for SDHC if the host device can handle 64GB and larger volumes.
*SDHC host devices will not test the new
capability bits defined for SDXC 4.0 cards. It will therefore not be able to use the new features of SDXC, such as transfer speeds above UHS104 (104MB/s)."
The meaning that I'm getting from the last paragraph is that the Sandisk card I ordered is a SDXC 4.0 and, so, I will not be able to use it in a sdhc card slot. Is that right?