If red recording raw cannot be opened, first check whether your phone supports the RAW format. The method is as follows:
1. On the desktop of the phone, click the camera application below to enter.
2. After clicking, in the shooting interface, click the settings icon in the upper right corner to enter the camera settings interface.
3. After entering, you will see the raw format option. If this option is not available, the phone does not support it.
4. If your mobile phone does not support RAW format, consider downloading snapseed software.