I want to install single folder which contains static data required in installer in STARTUP action how can I achieve this required behavior.In startup that folder should get installed in installation directory but single folder only not all of files.
When "Startup" actions are running, no files from the distribution tree are available.
If you need files at that point, you have to add them to
Installer->Custom Code & Resources
then they will be available in the ${installer:sys.resourceDir}
folder.
If that is inconvenient, you have to move your actions after the "Install files" action, then the files from the distribution tree will be installed.