If you store a lot of documents in iCloud Drive, and you're on a limited data plan, you may not want apps moving large files around unless you're on Wi-Fi. Cellular data use with iCloud Drive is nowhere nearly as intensive as streaming music or videos, but if you want to make sure not a bit goes by without your say so, you can manage it all in Settings.
How to turn cellular data on or off for iCloud Drive syncing
- Launch the Settings app on your iPhone or iPad.
Tap on iCloud.
- Tap on iCloud Drive.
Scroll all the way to the bottom and turn Off the option for Use Cellular Data.
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