To binary field section

The fourth section of the form for a Populate File task's properties is labeled To Binary Field. This section specifies a binary field in a record in which this workflow task will put a copy of the template Excel spreadsheet that has had data copied to it.

Except for the fact that this section is used to specify the binary field that will contain this workflow task's result, the fields in this section function identically to the corresponding fields in the From Binary Field section.