Client wanted to have underscore instead of colon(:) in the time stamp that is appended to filename for S3 export.

Use case: Client has some further processing with the uploaded file which is failing as the current file name contains colon(:)  in its name.

Using the NONE/Date will help us to avoid colons in the file name but we have noticed that the following run is over writing the file which might not be suitable for the client use case.