Which product are you using?
PDF.js Express Plus
PDF.js Express Version
Detailed description of issue
Is it possible to have it save the annotated pages individually? Meaning, people right now upload a 250MB PDF. They alter only a few of the pages and when they send it out, they send the entire annotated PDF. If the pages were split, they could just send the impacted pages.
Save each annotated pages separately in a folder to shart part of the pdf.