Upgraded everything to ios8 on the iPad, and to Yosemite on the iMac and Macbook Pro. I bought 200gb of iCloud Drive storage and then moved what was on an external drive to the iCloud drive on my iMac. No problem. Then I go to the Macbook Pro, open the iCloud Drive and what do you know? Only about half of the folders and documents are showing up! Same thing on the is iPhone 6 and the iPad 2 with iOS 8.