Card reader has letters G: H: and I: and the USB HDD is J:

My listed drives;

A: (floppy)
C: (master HDD - IDE)
D: (DVD-RW drive)
E: (DVD-ROM drive)
F: (slave HDD - IDE)
G: (card reader - Compact Flash)
H: (card reader - internal flash / Smartmedia)
I: (card reader - MMC/SD)
J: (USB HDD)