YaCy - How to set and move storage location

Running YaCy can result in large amounts of data being stored. There ought to be an easy way to set the default storage folder for all this data. How can we do this?

Sometimes, you might need to move that data to a different location and continue YaCy using the newer location, for example a different hard drive. How can we do this?

I think there should be a facility inculded for this in the RAM/Disk Usage section.