Having same issue right now. Got low memory message, deleted everything and now nothing works at all. Not even able to Power off the tv.
Welcome, and thanks for reaching out here in the Roku Community, @Whitty29.
We noticed you're having trouble with your Roku and we'd like to learn more to see how we can get this one up.
Let us know...
If you haven't tried any troubleshooting, we would recommend performing a system by navigating to Home > Settings > System > Power > System restart. Then try again and see if that makes a difference.
With more details, we can isolate the issue. We are waiting for your prompt response.
Thanks,
Emman
"Low memory" issues are often the result of the Roku's memory cache getting corrupted.
The memory cache can be cleared by restarting the Roku via "System restart" under "Settings > System > Power", or if you have no Power option, under "Settings > System".
If a restart doesn't do it, or if you don't have sufficient control with the remote to navigate the Roku menus, you can also restart by pulling the power plug to the Roku for a minute or so then plugging it back in.