"File too large to save"
I am trying to combine a number of smaller PDFs into a single document of 218 pages. The combined size of the documents is under 2.5 GB. I do not wish to save it as an Optimized or Reduced Size PDF. The message I get is "The document could not be saved. The file is too big for the current operation." These parameters seem well within the maximum size of document that can be saved.
I am using Adobe Acrobat Pro 2020 v. 2020.001.300.3018 (or Acrobat DC v. 21.0 , I cannot tell the difference) on a Mac, Big Sur 11.2.3.