Since you need to pass the document which from storage bucket I would you say, you can set destination path first after that you can download the respective document and store in destination once we have done with Digitalization you can get the documents
Steps → Download Document → Store in Path → Read the Document ->Delete the document
Have you checked the Document Understanding RE Framework?
Using queues and storage bucket, Digitize is done without downloading documents from the bucket.
The Document Understanding template and RE Framework are two different things.
The DU template does not digitize the document right from the Storage Bucket. Other steps use a Storage Bucket, but that’s for the Action Center steps - files can be stored in a Storage Bucket for display in Action Center.