How to Upload High-Resolution Photos from iCloud to OneDrive on iOS
Question details
The user wants to understand how the OneDrive iOS app handles the uploading of high-resolution photos when the original files are stored in iCloud and only optimized versions exist on the local device.

- Product
- OneDrive for iOS
- Device & OS
- iOS
- Scenario
- Backing up high-resolution photos to Microsoft OneDrive while utilizing Apple's 'Optimize iPhone Storage' iCloud feature.
- Observed behavior
- OneDrive must temporarily download the original, high-resolution photo from iCloud to the iOS device before it can successfully upload the file to Microsoft's cloud servers.
Ensure your iOS device is connected to a stable Wi-Fi network and has sufficient battery life, as downloading high-resolution originals from iCloud and uploading them to OneDrive can consume significant data and power.
Configure iCloud and OneDrive Camera Upload Settings
Adjust your Apple iCloud and Microsoft OneDrive settings to control how high-resolution photos are handled and temporarily stored during the upload process.
When your iOS device is set to 'Optimize iPhone Storage', the original high-resolution photos are kept in iCloud while smaller, space-saving versions are kept on your phone. For OneDrive to back up the highest quality version, it must briefly download the full file from iCloud.
You can manage this behavior by verifying your photo settings in both the iOS system settings and the OneDrive app.
Open the 'Settings' app on your iOS device, tap your Apple ID name at the top, select 'iCloud', and then tap 'Photos'. Here, note whether 'Optimize iPhone Storage' or 'Download and Keep Originals' is selected.
Launch the OneDrive app on your iPhone or iPad. Tap your profile picture in the top left corner, select 'Settings', and tap on 'Camera Upload'.
Toggle on 'Camera Upload' if it is not already active. Ensure you grant OneDrive permission to access all photos when prompted by iOS, allowing it to fetch the iCloud originals.

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Frequently Asked Questions
Does OneDrive delete my original photos from iCloud after uploading?
No. OneDrive only temporarily downloads the high-resolution photo to upload a copy to its own servers. It does not delete the original file from iCloud or the optimized copy from your iOS device.
Why does OneDrive take so long to upload photos on iOS?
If you use 'Optimize iPhone Storage', OneDrive must first download the full-resolution original from iCloud to your local device before it can upload it to Microsoft. This two-step process depends on your internet speed and can increase the total upload time.
Can OneDrive preserve the original HEIC/HEIF photo formats from my iPhone?
Yes, OneDrive can preserve the original high-resolution formats of photos uploaded from an iOS device, including HEIF and HEIC files. You can choose whether to upload them in their original format or convert them to JPG in the OneDrive Camera Upload settings.




