It is a type of link created by the command line utility
mklink. For example if the RPro multisample folder is now "D:\Rapture Pro\Multisamples" to create the junction for the original location
1) launch the cmd.exe as administrator
2) type
mklink /j "C:\Cakewalk Content\Cakewalk Sample Data\Rapture Pro" "D:\Rapture Pro" Now anytime a program looks for a file in "C:\Cakewalk Content\Cakewalk Sample Data\Rapture Pro" the OS will actually look for the data in "D:\Rapture Pro"