The first time you launch Horizon Client 4.0 or later, Horizon Client prompts you to select a folder. You can also select a removable storage device, such as a USB thumb drive.
Horizon Client uses the folder or storage device that you select to share files with remote desktops and applications. This feature is called client drive redirection. For complete information about the client drive redirection feature, including system requirements, see Share Access to Local Storage.
You can change the client drive redirection folder in Horizon Client at any time. See Change the Folder for Client Drive Redirection.