SOURCE: lexar jumpdrive
its simple ( i dnot have a mac)
go to applications and select Disk Utility and select ERASE !!
that would do the job dear !!
SOURCE: Lexar JumpDrive S70 - USB Flash Drive - 8 GB disconnect
this could a problem with an unstable driver you might have to unistall the driver restart your computer then reinstall the driver you will need to update/reinstall drivers right click to reinstall drivers if you can see your usb drive but its not working ports (com&lpt) right click update driver if this fails to fix the problem check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems to a computer and its parts you will need to download one try one of these http://download.cnet.com/usb2-0-driver-zip/3000-18493_4-163914.html http://download.cnet.com/usb-2-0-root/3000-18493_4-55793.html http://download.cnet.com/usb-mass-storage-controller/3000-18493_4-161651.html USB Mass Storage Controller http://download.cnet.com/via-usb-2-0/3000-2098_4-10163319.html Install a USB 2.0 host controller driver http://download.cnet.com/usb-mass-storage-controller/3000-18493_4-161651.html http://download.cnet.com/usb2-0-driver-zip/3000-18493_4-163914.html
if you motherboard came with a disk the drivers could be on it
otherwise you might need to download them
or a bad dusty or loose usb lead connection
click start control panel administrative tools computer management device manager scroll down universal serial bus controllers you could see a yellow question / exclamation mark? ! or a red X
hope this helps
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