For the computer display can not stop the universal volume device, how to solve the

problem description:
I don't know how to do it, every time I use a mobile storage tool such as a USB flash drive, when I pull it out from the computer, click the one on the bottom right. The safe exit icon will pop up a dialog box saying: "Now you can't stop ‘Universal Volume & rsquo; device. Please stop the device later." But this time I did not open the contents of the disk, ask why this is? How to solve?
Problem analysis:
In fact, the reason why the system can not stop the general volume device is because you copied the U disk The content inside, or the current software is using the file inside the U disk (such as editing the word file in the u disk, or the player is playing the movie inside the U disk, MP3, etc.), and the content is saved in the memory, Therefore, the U disk cannot be deleted.
Workaround:
This problem is more common and can be solved. The steps are as follows.
Open “My Computer”, choose your flash drive. Right-click and select "Attributes", then the "Removable Disk (H:) attribute will pop up" (The drive letter here is arranged by the partition of the operating system hard disk and the partition of the CD-ROM drive. For example, H disk) Window, click on the "Hardware" tab. Select the flash drive in "All Disk Drives" (Note: Do not choose the wrong one, there will be hard disk, floppy drive, CD-ROM drive, virtual drive, etc.), after selecting, click <;Properties>; The Flash Drive Name Properties window will open and select the “Policy” tab.
At this time, the user can choose according to his own needs: If the user selects “optimize for quick deletion, then the speed of reading and writing using the flash disk will decrease, but when the user directly unplugs the flash disk, The data of the flash drive will not be lost or damaged; if the user chooses “Optimize for improving performance”, then the flash disk read and write performance can be optimized, but if the user directly unplugs the flash drive, the data of the flash drive may be damaged. Or lost. Once you have made your selection, click “OK”
I believe that more than one computer user will pull the USB flash drive directly when the above problems occur, most of the time will not affect the U disk, but it does not rule out the failure, resulting in U disk There are also cases where it is not open, or data is lost, so it is still a good deal to deal with this situation.