Optional Values for UploadFolderStructure in Web.config
This article details the valuaes that work for UploadFolderStructure in Web.config for Workflow Manager.
The UploadFolderStructure element in the web.config can be set with multiple values to specify the folder structure used on the file system when uploading files.
The following values are currently the ones that work for UploadFolderStructure:
If you set UploadFolderStructure to an empty value, Workflow Manager uses the old structure: ServicerCo\ConsumerCo\WFName__GUID, where WFName is truncated to 10 characters.
<add key="UploadFolderStructure" value="WFName_WFNumber" />
Note: There should not be Square Brackets  around variable name in the value.