USB disk into 0MB or RAW format how to solve

U disk appears data loss or can not open the fault, often performance for u disk format changes, right button to view the properties of U disk, format is 0MB or RAW. This happens, how should we repair u disk file, save U disk?

USB disk into 0MB or RAW format solution is as follows:

1, first into the "Control Panel" and switch to the Classic view, locate the Administrative tools, double-click Open, double-click to open Local Security policy, click the plus sign before local policy, click Security Options, and in the right window, locate the Network access: Sharing and security mode for local accounts item. Then change the security settings "Guest only-local user to guest authentication" to "classic-local users authenticate as their own".

2, open "My Computer" in the raw format of the partition on the right button, click Properties, the Pop-up Properties dialog box to find the "Security" tab, "group or user name:" list box garbled delete, and then add the user can.

Tip: If you right-click the partition and there is no "safe" tab in the pop-up Properties dialog box, open "My Computer", click "Tools"-"Folder Options"-"view", and then cancel the check in front of the "Use Simple File Sharing (recommended)" button.

If you can not find a U disk, you can right-click "Properties" On My Computer, select "Hardware", "Device Manager" in the pop-up window, select "Universal Serial Bus Controller" in the hardware list, and right-click "Properties" on the USB MASS STORAGE DEVICE below. In the pop-up window select "Details", in the list box "Hardware ID" to see if there are vid and PID, and then on this Http://www.linux-usb.org/usb.ids Web page with vid and PID to find the main chip manufacturers and models of information. Use the mass production tool to repair the U disk.

If you still can not repair u disk, it may be a U disk internal damage, you can contact the professional repair point back to the factory repair.