In the previous chapter, we talked about how to use an end user attached USB storage device through remoting over the virtual channel. This could be useful for an end user to access a USB storage device attached to their client device through a virtual desktop served from the data center.
You might get the idea that you can use a USB mass storage device as a primary storage for the XenDesktop Site, VMs, or user data. This is not a good idea because if you remove the drive, you could lose all of your data. So, don't try it. Don't entrust your data to a USB drive.