Can you give a citation for that?
I've heard it a hand full times, but never seen anything to back the statement up.
The SD association state on their site the maximum capactity of a MicroSD card is 2GB, those are the standards.
http://www.sdcard.org/developers/tech/sdcard/ Devices are built to those standards.
How many people have had issues with MicroSD cards because they formatted using the Windows Formatter because it didn't format them to the SD standards? How many people have solved that using the Panasonic SD formatter which does format them to the specifications?
There's a reason you don't find these on store shelves.
Is a Sandisk document proof enough for you?
http://www.sandisk.com/media/File/pdf/SDHC1.pdf They might know a fair bit about MicroSD cards.
QUOTEBe aware of non-SDA 2.00 specification compliant SD 4GB, miniSD 4GB, and microSD 4GB cards on the market. If these non-compliant SD/miniSD/microSD 4GB cards record data in a SDHC host, and are then used in a legacy SD/miniSD/microSD host, issues and problems may occur. File system incompatibility, data corruption, and potentially you may actually lose the data/pictures. In addition, if these non-compliant SD/miniSD/microSD 4GB cards are inserted into a legacy SD/miniSD/microSD host device, the host device may not recognize/utilize the card as 4GB, and it instead may read as a 2GB card. If the SD/miniSD/microSD 4GB card does not have SDHC/miniSDHC/microSDHC on it, it is not SD 2.00 compliant.