I have purchase a Mini Pen Drive(as a removal usb storage) and a Card Reader with Compact Flash Card. This 2 model device is using standard USB port plug in. Currently, Linux Red-Hat 7.3 in use. I plug in the USB Card Reader with Compact Flash Card together, Linux system itself detect the device which the information can be view on ~/proc/scsi/scsi~ so to mount this device is on the Control Center. So I have mount this device, the icon appear on the desktop and automatic specify a name as 'flash'. So now I can use this device for read only but cannot write. This device actually can be write and read. I try to modified on permission on this device but cannot do anything on permission. *Please guilde me for this solution to make the USB card reader that can be work as read and write device.* The other device is USB Mini Pen Drive, the usage is almost same with USB Card Reader. The problem is, the device is been detected by Linux and information for the Mini Pen Drive show but on Contro Center didn't show the device to be mount. *Please guide me how to mount this USB Mini Pen Drive and use for read and write device* Both device use in Linux.