Dear Sirs, I had already tried $ mkdir /media/sim $ sudo mount /dev/sdc /media/sim But this doesn't work, as I don't know the filesystem of the card. Sirs, I took up the matter with the Debian & the Knoppix communities, as mentioned below: <a href='http://forums.debian.net/viewtopic.php?f=7&t=128156&start=30&sid=c650525e3dc6562592e29ab20c442e0d'>How to back up data of SIM Card using its Reader?</a></p> <a href='http://knoppix.net/forum/threads/31824-How-to-back-up-SIM-Card-data-with-its-Reader?p=133625#post133625'>How to back up SIM Card & data with its Reader?</a></p> The Debian Forum members' inputs can be followed from the link. Knoppix forum is silent. Do I need to install some packages to read the fs of the card? Regards -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html