How To Upload 9 GB of Acrobat Reader to either Google Drive or to Document Cloud

i have 9 GB of .pdf content on $free Acrobat Reader on iPad Air 2. I may in the future need to restore these files to a Windows OS so how can I upload the full 9 GB  - as a unit rather than uploading each file separately - to either Google Drive or to Document Cloud.

How do I purchase more Document Cloud storage - i assume that Adobe's $free default is less than 10 GB