According to this post, check the formatting of the card. FAT16 would indicate that it is most likely non-SDHC. FAT32 would most likely indicate SDHC.

So I'm trying to download peoples pics from their cameras.<BR>I've got a Dell with a four slot media card reader.<BR>My 2gig SD memory chip works.<BR>An 8gig SDHC card is not recognized.<BR>Doesn't ...

Which SD memory card is best? SD memory cards are widely used today, and while they may all look the same, there are some key differences to note to ensure they’re compatible with your hardware. Still ...

Expanding the company's line-up of SD Memory Cards are a 4- GB Class 6 SDHC, 4-GB Class 4 miniSDHC, and a 2-GB microSD memory card. The SDHC card achieves a maximum speed of 20 MB/s and a Class 6 SD ...

The SD memory card which had been able to expand the capacity to only 2 GB can be expanded even further "SDHC memory cardAlthough it is spreading in earnest, the 32GB model corresponding to the ...