Clearing Downloaded Content (iOS)
Clearing downloaded content will help you save storage space on your device.
--CLEARING ALL ITEMS--
Tap on the sync button.
Tap on the trash icon.
Select All or the section of content that you want to remove.
The content you select will be removed from the downloader.
--CLEARING INDIVIDUAL ITEMS--
Long press on the folder that you would like to remove.
Select Remove from Downloader. This will delete this folder's content from your device.
Removing all content from the device can also be accomplished through the Settings menu: Settings > More > Clear Downloaded Content