iCloud Drive

You can directly transfer files from your iCloud Drive to a number of other cloud storage services including Amazon Drive, Dropbox and Google Drive among others. To send a file from iCloud Drive to your Amazon Drive, open up your iCloud Drive on your iPhone or iPad and select the file you want to move. Now tap on the share icon in the bottom left and choose Amazon Drive, then choose where you want to save the file on Amazon Drive and tap "Save" in the bottom right.

You can easily send a file directly from your iCloud Drive to your Google Drive (or to DropBox, Amazon Drive or a number of other services) via your sharing options. Open up iCloud Drive, select a file and then tap the share button in the bottom left.

Instead of downloading files from iCloud Drive to your computer then uploading to Dropbox, you can simply transfer them directly between the two services from your iPhone or iPad. To do so, open up iCloud Drive and select a file. Tap the share button in the bottom left and choose Dropbox. Now you can choose which folder on Dropbox you want to save it in. Tap "Save" in the top right and your file will be saved to your Dropbox account. Now you can delete it from your iCloud Drive.