Attachment Folders from External Storage Disk is not removed while Retaining Incident and Deleting Original Message/Attachments/Files. Although the Folder is completely removed if Delete Incident Completely is selected and executed.
LOB’s on disk
When an incident is externalized to disk there are several files created to store the LOB type data that would have otherwise been stored in the DB if externalization was not set ON.
As highlighted above, the LOB portion will be 1 & 2 as this is the where the bulk of the data is stored. 3 &4 are not considered LOB data as that is the information retained by DLP for an incident and it is a minuscule part of the larger LOB and will remain unless you delete the incident completely.
LOB’s in database
The CrackedComponent and CrackedComponentMarkers field are never deleted by the ID even when incidents are in DB.