As we move toward an increasing electronic environment, we now scan and upload many documents into electronic database systems. To avoid delays and improve scanning efficiency, we recommend that you do not:
Hole punch, staple, paper clip, binder clip, or otherwise attach documents to one another.
Include photos or documents smaller than 4x6 inches for evidentiary purposes. Provide photocopies of these items instead. The only exception is when we request a passport photo with the filing.
Include anything that contains electronic chips and batteries (such as musical greeting cards) or any non-paper materials such as cassette tapes, CD-ROMs, DVDs, toys, action figures, or thumb drives. We will not accept these types of materials. However, we will accept photographs or photocopies of these items.
Read more at: https://www.uscis.gov/newsroom/alerts/recommendations-for-paper-filings-to-avoid-scanning-delays
Contact Darren Heyman, immigration attorney, for more information.