I am having trouble saving my combined PDF binder to my computer.

Hello Crystalstevens,

Sorry for delayed response and inconvenience caused. Asper the description above, you are not able to save a PDF file as getting an error message, Is that correct?

Please check for any pending updates of Acrobat from help>check for updates, reboot the machine after installing the updates and see if this brings any difference.

Would you try the following steps:

In Acrobat, go to Edit>Preferences>Documents - uncheck "Save As optimizes for Fast Web View" and then Save the combined file.

Are you trying to save the file to an external drive or local drive? Some devices (network drive…) cannot handle files larger than 2 Gb, regarding of their formatting.

Is it possible to share the PDF file with us so that we can try it at our end? To share the file, please use Adobe Send feature, upload the file, share the link to files via private message only, How Do I Send Private Message

What is the dot version of Acrobat installed? To identify refer to Identify the product and its version for Acrobat and Reader DC

Is it a Mac or Windows machine?

Let us know how it goes and share your findings.

Regards,

Anand Sri.