Cannot format USB Disk Drive because of I/O Device Error

[odongping]

my flash LG 2GB flash has refused to be formatted with response access denied please help

 

[ksiemb]

my flash LG 2GB flash has refused to be formatted with response access denied please help

Well, which is it - what you say in the title, or what you say in the body of your post ? ?

 

[luke12]

Does it say "the usb disk is not formatted, do you want to format it now?" or with error code "cannot be initialized" or so?

Possible reason can be usb corruption, file system error etc, see this article fix usb not formatted error for the step by step fixes.