Thannks Champagnemojo but /dev/sda doiesn't seem to work. Gives me an error /dev/sda or /dev/sdb is not a block device"

I have a Transcend Jetflash 128 MB brand new Stick for USB 2.0 and it is working fine on Windows. Also /utilitis/tools/usb view recognises it as

Flash Disk
Manufacturer: USB
Serial No. 61100740FC7A4D7D
Speed: 12 MB/s
USB Version : 2.00
Device Class: 00(>ifc)
Device Subclass: 00
Device Protocol: 00
Max Default Endpoint size: 64
Number of Configurations: 1
Vendor Id: 0ea0
Product ID: 2166
Revision No. 2.00

So I think it is being recognised ok.

The question seems to be what /dev/xxx entry corresponds to this Flash Rom. I am logging in as Root shell so I don't think it is an issue of permissions.

I need the correct value of this XXX. Any ideas.

Thanks