How to detect a U disk on a computer is a shrinking disk

method One:

1, the U disk inserted into the computer, open My Computer, right click on the disk of the U disk character, select attributes;

2, as shown in the picture, the display is a 4G u disk (shown as 3.9G is normal, because the hardware itself will occupy part of the capacity);

3, in this U disk to create a new name for the "movie" folder, and copy the video file into this folder;

4, after the completion of the copy, view the file or U disk properties, the size of the diagram is 1.62GB (no more than 3GB);

5, click the Eject U disk (this process is very important);

6, plug in the U disk, and open, found that the contents of the movie folder disappeared;

7, but open U disk properties, the display capacity is still occupied by 1.62GB, also available 2.28GB, indicating that the U disk is a shrinking disk.

　Method Two: Use antivirus software to detect

1, open Jinshan poison PA (or other software), select "Visionary", click on "U Disk Guardian";

2, click on the "Capacity identification" testing the real capacity of U disk;

3, the identification results show that the U disk is indeed a Shrink U disk, its display size is 4002MB, the actual only 975MB (is 1GB capacity).

On the computer to test whether the disk is a shrinking disk of the two methods introduced to this, in the purchase of U disk when you have to be careful not to buy a shrink u disk.