(DOCSP-45647) includes admonition for preparing the data directory when adding a replica set member

Author: carriecwk

source/includes/steps-add-replica-set-member.yaml

@@ -82,6 +82,14 @@ content: |
            - Specify the full path of the directory where the ``mongod``
              process will store data files.
 
+             :gold:`IMPORTANT:` Make sure the new member's data directory does not 
+             contain data. The new member will copy the data from an existing member.
+
+             If the new member is in a :manual:`recovering </reference/glossary/#std-term-recovering>` 
+             state, it must exit and become a :manual:`secondary </reference/glossary/#std-term-secondary>` 
+             before MongoDB can copy all data as part of the replication process. This process takes time 
+             but does not require administrator intervention.
+
          * - :guilabel:`Log File`
            - Specify the location and name of the log file for the ``mongod``
              process on the new host.