U disk appears 0MB and RAW format failure solution

Step 1: First enter the “Control Panel” and switch to the classic view, find “Administrative Tools”, double-click to open, then double-click to open “Local Security Policy”, click ““Local Strategy&rdquo” ; in front of the plus sign, click on the "Security Options", find the "Network Access: Sharing and Security Mode for Local Accounts" item in the right window, then set the security settings behind it “Only Guest - Local The user has been authenticated as a guest identity & rdquo; changed to "classic - local users authenticated by their own identity".

Step 2: Open “My Computer”, right click on the RAW format partition, click on Properties, and in the pop-up Properties dialog box, look for “Security” label, “will be” Group or user name: & rdquo; The garbled in the list box is deleted, and then the user of the machine can be added.

Tip: If you right-click on the partition, if there is no "Security" tab in the pop-up properties dialog box, you can open "My Computer" and click "> Tools" - click on the file Clip options & rdquo; - & ldquo; view & rdquo;, will be "use simple file sharing (recommended) & rdquo; in front of the checkmark can be canceled.

When the above method cannot be solved, you can use the software such as easyrecovery to save the U disk file and then perform low-level. If you can't find the USB flash drive, you can right click on “My Computer” and select “Attributes”, then select “Hardware” in the pop-up window, “Device Manager”, select from the hardware list. “Universal Serial Bus Controller”, right click on the following USB MASS STORAGE DEVICE and select “"Attribute”, in the pop-up window, select “Details” and select “"Hardware ID" in the list box. To see if there is VID and PID (you can also use "ChipGenius V2.55 U disk master chip detection" software), and then at this http://www.linux-usb.org/usb.ids page Use VID and PID to find information about the manufacturer and model of the main control chip. Use the mass production tool to repair the USB flash drive.

If you still can't repair the USB flash drive, it may be internal damage of the USB flash drive. You can contact the professional repair point to return to the factory for repair.