Question : sd card error

I recently purchased a new sd card. The built-in reader on my Dell Optiplex 740 gives the following error:

H:/ is not accessible
the request could not be performed because of an i/o error

The built-in reader on my HP laptop reads it fine. The Optiplex can read all the other sd cards I have. The card is 4GB. I suspect it has something to do with the sized of the card or a newer version of some driver or USB version?

Answer : sd card error

That is true. However, it's possible the hardware supports SDHC but BIOS or driver did not at the time. In the link I referenced this was confirmed to be true for the XPS 410, which seems to use the same card reader as the Optiplex 740.