TikTok plans to shut its app for U.S. users from Sunday, when a federal ban on the social media app could come into effect, unless the Supreme Court moves to block it, sources familiar with the matter said.

If TikTok shuts down, it will show users a pop-up message pointing them to a website with information about the ban, according to the outlet's sources. The company will also reportedly let users download all of their data.

TikTok is actually required to only ban new TikTok downloads on Apple and Google's app stores in the U.S., while existing users would still be a