Managing external storage of container data
For each database, you can define one or more base directories in which to store container data externally. The default location for each base directory is the database’s location. You can add, edit, or delete base directories. You must have full access privileges to create or change base directories.
To create or change a base directory:
With the database open, choose File menu > Manage > Containers.
The Storage tab displays at least one base directory (the default). You can edit this base directory, but you can’t delete it unless there are others in the list.
In the Storage tab, create, edit, or delete a base directory for the container fields in this database.
You can set up subdirectories for individual container fields in Field Options.
Click New. In the New Base Directory dialog box, type a path for the base directory. A base directory can be an absolute path, a path relative to the database location, or a network path. (You can see examples of base directories at the bottom of the dialog box.) A base directory cannot contain references to a parent folder (“/../”).
Select a base directory in the list, then click Edit. In the Edit Base Directory dialog box, change the path shown for Base Directory.
If a base directory ends with a colon (:), the last part of the path is treated as a prefix for filenames. For example, if the directory is /invoices/inv_:, then all invoices will be stored in the Invoices directory, and their filenames will have the inv_ prefix.
Related topics 
Creating file paths