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I take all the pictures with my smart phone. From there, I e-mail them to my computer which operates on Windows 10 and has Chrome as browser.
I save the pictures in File explorer. From there, I'm...

I have never used those services, but I found the following:

https://makeawebsitehub.com/free-photo-hosting/

I hope this is helpful!

When you go to "Manage Attachments", does a window open that says "File Upload Manager"?