How do I transfer files in iCloud/Pages to iCloud Drive?

I am trying to remove all files from iCloud/Pages by transferring them to iCloud Drive. The only method I can see at the moment is to download each file individually, then use 'move to' to put them on iCloud Drive. I have hundreds of documents and this would take a very long time. Is there any short cut?

I need to do this because of an ongoing problem with Pages for IOS - even with the new feature where I do not have to download all 800 documents to my phone (not anywhere near enough memory), connecting Pages IOS to iCloud causes it to become extremely sluggish, or freeze, or crash - so I thought if I removed all files using my MacBook Air from iCloud/pages and put them all on iCloud Drive I would solve that problem.

Edward Smith