Open one of the copies and then select Tools - Forms - More Form Options - Export Data.
Save the data file somewhere on your computer.
Now open the other file and do the same, only select Import Data, and then select the file you just saved.
Thanks for answer. I have 2 problems or issues, I guess. First, I use Adobe Acrobat X Pro version 10.1.16, and when I go to Tools - Forms - More Form Options I must go to Admin Form Data (I have the spanish version, so I translate my best) and in this option I found Import Data and Export Data BUT disabled, and I have also notes and comments in the PDF file.
I upload the PDF from my tablet, with android, when I have Adobe Acrobat 15.3.1. But, even I'm sure I have notes and comments in this PDF, when I open it in my laptop, nothing, no comments, no notes.
Do you have any idea what could be happening?
Thanks for your assistance
Sorry my grammar
I don't think you'll be able to do in on the tablet, only on a desktop computer.
If these options are disabled then it might be that the file is secured, or digitally signed, or something like that.