MyCloud stops uploading pics in the middle of a download

I have an iPhone 12. I clicked on 2700 images to upload to MyCloud. After 900 images it stopped uploading the images from my phone to MyCloud? This keeps happening. Any suggestions?

Hi @KPC,

Have you opened a Support Case? If not opened, for more information, please contact the WD Technical Support team for the best assistance and troubleshooting:
https://support-en.wd.com/app/ask

Thank you