Create an /opt/datahub folder in the root directory. OS: Windows, Tomcat 7, where create folder ???? (root directory)
https://help.hybris.com/6.3.0/hcd/478f702a00104636b16d2614d1db30ac.html
In the datahub folder, create the following new folders: config - to be used for local.properties and datahub.encryption.key.txt extensions