Mobile data usage for iCloud Drive is turned on

My phone uses a large amount of mobile data

1
Find "iCloud"
- Press Settings.
- Press your Apple ID.
- Press iCloud.
2
Synchronise files
- Press the indicator next to "iCloud Drive" to turn file synchronisation on or off.
  If you turn on file synchronisation, your files are automatically synchronised via Wi-Fi.
- you can synchronise the files on your phone, such as presentations, spreadsheets, PDF files and other kinds of documents with other devices using iCloud.
3
Synchronise pictures
- Press Photos.
- Press the indicator next to "Upload to My Photo Stream" to turn the function on or off.
  If you turn on the function, all new pictures on your phone are synchronised with other devices via iCloud.
- Press arrow left.
4
Synchronise other phone contents
- Press the indicator next to the required data type to turn synchronisation on or off.
5
Return to the home screen
- Press the Home key to return to the home screen.

Did this solve your problem?

1
Find "iCloud"
- Press Settings.
- Press your Apple ID.
- Press iCloud.
2
Synchronise files
- Press the indicator next to "iCloud Drive" to turn file synchronisation on or off.
  If you turn on file synchronisation, your files are automatically synchronised via Wi-Fi.
- you can synchronise the files on your phone, such as presentations, spreadsheets, PDF files and other kinds of documents with other devices using iCloud.
3
Synchronise pictures
- Press Photos.
- Press the indicator next to "Upload to My Photo Stream" to turn the function on or off.
  If you turn on the function, all new pictures on your phone are synchronised with other devices via iCloud.
- Press arrow left.
4
Synchronise other phone contents
- Press the indicator next to the required data type to turn synchronisation on or off.
5
Return to the home screen
- Press the Home key to return to the home screen.