1. Use Windows self-with tools
Click on the security removal hardware icon in the System notification area and click on the device name. When the system shows you can safely remove the hardware, you can unplug the storage device. If the information that is displayed is that the device is currently in use, you will need to perform the following steps.
2. Reasonable Guess
First you need to think about what is taking up storage devices. What software, documents, pictures, or other files are you loading from? If so, you need to close them all, wait a moment and then perform step 1 again.
3. Using third party tools
Many free Third-party software claims to be able to solve the problem of storage devices being consumed, but few are truly effective. If you don't mind spending some money, USB safely remove is a very useful tool, although its price is as high as 20 dollars (about 124 yuan).
After installation, it will replace the removal hardware tool that Windows brings, and the two work in a very similar way. If you can't remove the hardware, this software can tell you what is taking up storage devices and provides the option to force the shutdown.
4. Log off and log in again
If you don't want to spend money on a software that's so expensive, there's a stupid way to try it--Log off the computer. After you log off the current account, all open files and programs will be closed, including those that occupy storage devices. Once you have logged in again, you should be able to safely remove your device.
5. Shutdown machine
If the above method still doesn't work, it's only the most troublesome but also the most effective way: Shut down the computer. After shutting down, you can safely unplug the storage device without fear of causing any damage. But this is obviously not a long-term solution, and the next time you have this problem, you'd better have found other solutions.