How does MyCloud build Thumbnails?

hi, i’ve uploaded many photos to mycloud 4TB but can someone tell me how often or whether mycloud builds image thumbnails at all because i can’t see any thumbnails preview of photo or video files? is there some setting i need to put to allow the server to build these thumbnails?

thanks in advance

It always helps if you say what device you are using to try and view your photos/videos. How did you upload them and how long has it been since they were uploaded? See example images below from my Desktop, Windows 10, using File Explorer.

You may want to visit here and read up on the My Cloud.

https://support.wdc.com/product.aspx?ID=904&lang=en