If you want to upload a photo from your external device to skyscraper page, I would use Imgur.
I'm not sure if there's an easier way, I assume there is but here's how I do it. First, connect your device to your computer and upload the file there.
For instance, If I've taken a photo from my phone, tablet, etc... You can either share the photo to the cloud, connect ur external device to your laptop via USB to upload your tablet photos from there, or other options if you have them. The goal is to have the photo from your tablet transferred to your main computer.
Then, you just insert the photo onto imgur by either dragging the file or selecting a file to upload.
For example, I want to upload this photo to imgur:
Go to Imgur and click this:
Upload your photo from there and it should pop up.
Then, right-click the image and click copy image link. It won't work if you click "copy link" on the imgur website.
Then, just click the little image icon:
and paste the link.
It's unfortunate that this forum software is old so I have to resort to this, but it shouldn't take only about 30-10 seconds if your snappy with it. If anyone has a better way of doing it I'd be glad to hear.