A Microsoft file hosting and synchronization service.
OneDrive on iOS no longer uploads from iCloud-optimized photos or iCloud-only storage. It only uploads the local Camera Roll content that is actually stored on the device.
If Optimize iPhone Storage / iCloud Photos is enabled, many photos and videos may exist only in iCloud (with low‑res thumbnails on the device). OneDrive cannot upload those optimized items. To allow OneDrive to back them up, iCloud optimization must be turned off so the full-resolution files are stored locally:
- On iOS, go to Settings > Photos and toggle off iCloud Photos (or disable optimization as described in the docs).
- Alternatively, in some guidance it is described as Settings > iCloud > Photos > Optimize Storage – this must be cleared so photos are stored on the device.
Microsoft’s documentation explicitly states:
- “OneDrive cannot upload photos optimized for iCloud. To disable optimization, tap Settings > Photos and toggle off iCloud Photos.”
- Or: “To turn off optimization, tap Settings > iCloud > Photos and clear Optimize Storage.”
So the behavior described is correct in effect: with iCloud optimization enabled, OneDrive will not back up those optimized photos/videos, and they will appear as not uploading.
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