Thanks for your answer.
I suppose I already have SCSI support since my HD is recognize in /dev/sda. I think I have the "Probe all LUNs" option selected (I have done a 'make xconfig' in the sources of my kernel and this option is selected : is that the right way to see if the option is selected ??).
How to see if 'usb-storage' is on my system (I am a newbie : is that an option for the kernel too or a module ?) ? I suppose I have USB support because I can use some usb devices (e.g. wifi via usb-device).
I can make 'modprobe usb-storage' (this module is not loaded by default). The result of lsmod | grep usb is then :
lsmod | grep usb
usb_storage 74761 0
scsi_mod 135785 3 usb_storage,libata,sd_mod
It seems that I have all I need to use memory cards. But I don't know how to use and access it ?
Additional info : when I insert a memory card, no led is lit : nothing happened.
I am on Fedora 4 with a 2.6.14-1.1637_FC4 kernel.