To preserve the image quality of original photos and to save storage space, starting in September 2019, OneDrive on iOS will upload High Efficiency Image File Format (HEIF) photos in their original format, instead of uploading them as JPG to OneDrive.
HEIF and High Efficiency Video Coding (HEVC) are the default file formats for photos and videos on most Apple devices running iOS 11 or later. Most Mac computers, iPhones, and iPads can open these files. You can also view these files on the OneDrive website.
To learn more about the HEIF and HEVC file format, and which Apple devices can capture media in HEIF or HEVC format, see using HEIF or HEVC media on Apple devices.
Preview HEIF and HEVC files in OneDrive
If you’re using a non-Apple device (such as Android devices, PCs, or other Windows devices), you can preview HEIF and HEVC files in OneDrive and store them on your device, but you may not be able to open them without additional apps.
Update your iPhone or iPad to capture compatible photo types
If you want to continue working with non-HEIF photo and video formats, you can update a setting on your Apple device camera to capture photos and videos in other formats.
On your iOS device, open Settings, then tap Camera > Format.
Under Camera Capture, tap Most Compatible.
Open HEIF and HEVC files on a Windows computer
To open HEIF and HEVC files on your Windows computer, you may need to install a codec from the Microsoft store. You can buy HEVC Video Extensions for $0.99.