Adding downloaded icons and templates to library for continued use

Hello Robert, 

Thanks for reaching out!

Content Library 360 items are designed to be downloaded before use in a Storyline 360 project file.

If you'd like to add your downloaded icons and buttons from a template, you can explore the following options:

• Publishing slides with the icons and buttons using Storyline 360's Team Slides feature and then importing the team slides to a course you're working on.
• Creating a custom Storyline 360 template that contains only the icons and buttons so you can reuse them anytime by importing the template to your course. 

I'll let other community members chime in in case they have other suggestions they'd like to share!