Refreshing Windows XP to Windows 7 Using a USB Drive (Part 1 of 6): Creating a USB Deployment Share
Source: Microsoft Corporation
Typically, target computers have high-speed, persistent connections to the deployment infrastructure. However, some target computers may connect to an intranet remotely or not at all. To deal with this, the MDT 2010 provides one with two methods for deploying operating systems and applications: Deployment share: This method uses a network shared folder in which all the deployment files reside and to which the client machine will connect. Media: This method creates an image that one can use to perform deployments from removable media, such as DVDs or USB Flash Drives (UFDs).