A few of my thoughts regarding files. Although the Americans, and others, captured literally tons of documents, many documents were also put on microfilm. The Germans, and a few of their allies, may have done the same during the war. Their purpose would have been transporting a smaller number of microfilm containers to other locations. I have read many reports of not just a mass burning of files and photographs, but I have also read of material being held in private collections, the owners unknown till today. So, for one purpose, the burning of physical documents could be a ruse. It is also true that many original documents and reports by T-Force, the American Counter-Intelligence Corps, which sometimes worked with T-Force, and other units like the Field Intelligence Agency, Technical, collected material and took their own photos. A significant amount of which are still classified.
The Germans, including the Deutsches Museum, negotiated with the Americans for the return of historical documents to Germany for decades.
http://www.cambridge.org/us/academic...ond-world-war#
These included files from the ALSOS Mission which were sent to the Deutsches Museum in the late 1990s, sorted and reviewed, and in 2001, selected documents were put on public display. There is no mention as to why other files were not displayed.
Ed