It is not possible to move pages to another document by dragging and dropping.

When I select some pages from document 1 and drag & drop it into document 2, the following message is displayed and the function does not work.
“There is not enough temporary disk space for this operation.”

My version of Adobe Acrobat is pictured below.

I recorded the screen video and attached. Please check it out.

I am not a native english speaker and I used translator to write down this article. Please understand if some sentences and words sound awkward.

Thank YOU!