Windows 7: usb not showing space and not opening?

hi....
my usb drive is not showing any space or data.

last time , i made it bootable of win7.

and then i copied the win7 all files into usb drive.

then i deleted that file and choose the eject option to making it off.

i ejected it for 5 to 6 times.

after that my usb not working.

when i try to open it then these messages come.

i take pictues of it. soo see them.

Change the file system to NTFS and format.

What happens then?

Hi maifs,

Do you have another USB drive to check with? Is this the only one you're having problems with? What I have noticed from your images is the green bar at the top. I would try again, this time wait until the green bar has finished its progression. Basically, it is reading and indexing the contents of the USB drive you have inserted to make it easily accessible. During this time, you cannot access the device to format it because it is in use by the indexing service.

But look at his last two images. It's finished, yet still reading as 0bytes

this usb is in already ntfs.
this is not issuing that wheather it finishes green bar at top or not.
i tried many times when its finish.
yes i tried it too , other usbs works properly.

Your USB flash drive probably needs its "launcher" program re-installed.

It was probably deleted or corrupted when you made the flash drive bootable.

Go to the manufacturer's website and see if they have a launcher you can download and install on the USB drive.

How did you "make it bootable of Windows 7." ?

Did it boot ?

If so, to boot from it, was it by:

1. Changing the BIOS select, or

2. Using a 'BootMgr' entry from the 'boot-up' screen ?

it didnt boot from usb.
i tried this.

Step 1: Format the Drive
The steps here are to use the command line to format the disk properly using the diskpart utility. [Be warned: this will erase everything on your drive. Be careful.]
1.Plug in your USB Flash Drive
2.Open a command prompt as administrator (Right click on Start > All Programs > Accessories > Command Prompt and select “Run as administrator”
3.Find the drive number of your USB Drive by typing the following into the Command Prompt window:
diskpart
list disk
The number of your USB drive will listed. You’ll need this for the next step. I’ll assume that the USB flash drive is disk 1.
4.Format the drive by typing the next instructions into the same window. Replace the number “1” with the number of your disk below.
select disk 1
clean
create partition primary
select partition 1
active
format fs=NTFS
assign
exit
When that is done you’ll have a formatted USB flash drive ready to be made bootable.

Step#2:
Creating bootable USB flash drive
Download Windows 7 iso (32-bit) file to your desktop (The download link is no longer valid).
Download and install WinRAR.
Right-click on the Windows 7 iso file and select Extract files. Extract the files to a folder (you can name the folder any name you want, but for illustration purpose, I name it win-7) in your desktop.
....................Extract files.....
In your command prompt, cd to the windows 7 folder.
cd Desktop/win-7 (Change the destination to the folder that you have extracted)
cd boot
bootsect /nt60 X: (X is the drive latter of your USB drive )
Step#3:
Now, copy all the files from the Windows 7 folder to the USB flash drive.
Reboot the computer. Remember to change the first boot device to your USB drive in the BIOS.
You should be able to install Windows 7 from your USB flash drive now.
..................xcopy d:\*.* /s/e/f e:\

i have found the solution of this.
i found a utility program which force it to format and lastly my usb has been formatted noww.

Good to hear!

Should we now guess as to which utility that is ???