Sometimes you may already have a document / image stored in one of your other cloud storage locations that you want to link to from your Edufolio (and to save space that's actually a pretty smart move, nicely done!).
The idea here is pretty simple. Your existing cloud service provider (let's say Microsoft's OneDrive) will provide you with a way to create a link to your resource (e.g. document, image etc.). It will generally look like a shortened web address, for example:

(Image sourced from: https://support.office.com/en-us/article/share-onedrive-files-and-folders-9fcc2f7d-de0c-4cec-93b0-a82024800c07 with all rights belonging to Microsoft)
You would copy the address they have helped you create, and then you will paste this into the page / post of your Edufolio to link to that content. Here's a quick screenshot to show you what that would look like:

To recap you'd simply:
- Visit your cloud storage provider (e.g. OneDrive)
- Create / Generate a share link / address to the resource you want to share on your Edufolio
- Select the text you want to link to the resource from.
- Click on the Hyperlink icon
- Paste the share address (from your cloud service provider) into the text field shown above
- Click the apply icon (
) then update / publish your post. All done!
Here are a few articles to get you started with creating share links with some of the key cloud storage providers:
- OneDrive - Share OneDrive files and folders
- Google Drive - Share files from Google Drive