By default, Voyager stores its configuration, data, logging and other files in ${data.dir}/config. To view the current settings, go to Manage > System. The file information is under the Configuration heading.
Config
Contains information for appearance (appearance.dex), discovery (discovery.dex) and other settings.
Data
Contains folders for logs, index, configuration and metadata.
Index
Contains all Index information.
Logs
Contains logging information.
Temp
Contains temp file information
Meta
Contains metadata information
Maps
Contains map information, if present
Apps
Contains additional application information, if present
You can override the data.dir location and/or the location of all subdirectories in the data.dir by editing the voyager.vmoptions file in the Apps folder (see figure above directory).
For more information on changing directory locations, refer to this knowledge-base article.