This question already has an answer here:
I had downloaded Chrome OS Vanilla and wrote it to an 8 GB pen drive. After I checked it out I tried to remove it.
I plugged in my pen drive and it asked me to format it. There was only one option of 1 GB. After formatting I just had 1GB on my pen drive.
Then I followed this procedure:
- Run » CommandPrompt
list disk» Enter
- Find out the allocated number of your disk
select disk X» Enter (X is the number for your drive)
After following this when I plug in my device it asks me to format disk. It shows unknown capacity.
After clicking start it says Windows was unable to complete the format. Then when I close it, it says:
Windows can't format H. Check to see that the disk and drive are connected properly, make sure that the disk is not read-only, and then try again. For more information, search Help for read-only files and how to change them.
Now I cannot use it and it has no memory.
In disk management, I had right clicked and clicked create new simple volume. Then I got my 8 GB back but in RAW format and it was write protected. The next day, when I plugged in my USB it was write protected and disk management shows Unallocated.(now)
After typing clean and pressing Enter in command prompt I get:
DiskPart has encountered an error: Incorrect function. See the System Event Log for more information.
When I double click the device in Computer:
I:\ is not accessible.
The volume does not contain a recognized file system. Please make sure that all required file system drivers are loaded and that the volume is not corrupted.
When I run HP USB Disk Storage Format Tool, V2.1.8 and click format I get:
Device media is write protected