This might help:
Insert your USB drive
Type in "Device Manager" in the "search the web and windows" box, and open it.
Click on "Disk Drives" and then right click on the drive you've inserted and select "Properties"
Click on the "Policies" tab at the top
You should have this box where you can select either "Quick Removal" or "Better Performance"
Click image for larger version. 

Name:	drive.PNG 
Views:	16 
Size:	22.4 KB 
ID:	36041