Thanks for your post.
We are more than happy to help you personalize your Roku experience. For clarification, have you already created digital albums or Photo Streams and uploaded the photos? If so, then you can now set Photo Streams as the screensaver and do this from the Settings menu using the steps below.
- Press Home on your Roku remote
- Scroll and select Settings
- Select Theme to open the Theme menu
- Select Screensavers
- Select Photo Streams
- Select Set as Screensaver to set Photo Streams as the screensaver
For full information on this, you can take a look at this link: How to use Photo Streams on your Roku streaming device
I hope this helps. Let us know how it goes!