Hello SvenMBL,
I am Antonio, a Microsoft Community independent advisor, a Windows 10 and Microsoft office user like you. I hope I can help you on your concern.
Please try to follow the steps below.
- Connect your iPhone from your computer
- Go to Settings on your iPhone
- Open Photos and navigate to the bottom
- Under ‘Transfer to Mac or PC’, change it from Automatic to Keep Originals (“Automatically transfer photos and videos in a compatible format, or always transfer the original file without checking for compatibility.”)
- Connect again the iPhone device to the Windows 10 computer and copy/paste the files again.
You're response is highly appreciated. Please let me know if the issue is fixed, if not, I will find another way.
Please let me know if you need further assistance.
Keep safe always.
Sincerely,
Antonio