I'm having kingston datatraveler 120 4gb .It is

try going to this link might be something very simple but they have good information. http://www.kingston.com/en/support/technical/products?model=DTHX30 could be a case of being a usb configuration problem

go to start , RIGHT CLICK on My computer the select manage.
In the window that will open choose manage disks and reformat your usb stick (if it's not shown there connect it into another port and repeat )

1]Go to control pannel
2]Go to System and Security
3]Go to Device Manager
4]Click Universal Serial Bus Controllers
5]Right click the USB
6]Click Uninstall
then Reboot computer while pendrive is inserted in USB
Then connect to the internet.
When you connect to the internet if the said USB is empty
(i.e. no device is inserted in it) they install the device
eventhough the device is not present, causing the said error.

click start click on my computer you should see your usb drive
right click then select format

another way is to control panel administrive tools computer management disk management right click on your drive select format
hope this helps

The Kingston Datatraveller 200 is a counterfeit. They are not actually made by kingston, and are a fake product being sold to scam people. I'm sorry, but you'll have to return it.

may be toomuch virus

datatraveler dti.4gb ""the disk in drive E is not formatted" how to solve my problem

Try formatting the drive. Should be a problem with the file system.

Try HP formatting tool with administrator previliages in vista

You can use with Windows2000 and up and other operating system, you ca check this link for the complete information about this device http://www.kingston.com/ukroot/flash/dt_secure.asp?id=2

Hope that helps...........