Explanation/Reference:
See step 2 below.
To prehash content and preload the content on hosted cache servers
Log on to the file or Web server that contains the data that you wish to preload, and identify the folders

and files that you wish to load on one or more remote hosted cache servers.
Run Windows PowerShell as an Administrator. For each folder and file, run either the Publish-

BCFileContent command or the Publish-BCWebContent command, depending on the type of content server, to trigger hash generation and to add data to a data package.
After all the data has been added to the data package, export it by using the Export- BCCachePackage

command to produce a data package file.
Move the data package file to the remote hosted cache servers by using your choice of file transfer

technology. FTP, SMB, HTTP, DVD and portable hard disks are all viable transports.
Import the data package file on the remote hosted cache servers by using the Import-

BCCachePackage command.
Reference: Prehashing and Preloading Content on Hosted Cache Servers (Optional)