Engadget Details 4 Ways to Use Roku Devices Without Internet

Q: For flawless 4K streaming at home, is a dedicated NAS a better investment than simply upgrading your internet plan?

A dedicated NAS is the better investment only if your “4K streaming” means playing your own movie files around the house; if you mainly watch Netflix, YouTube or live sports, upgrading your internet plan matters more. The key distinction is where the video comes from. A NAS serves files over your home network, so playback depends on your local setup, not your broadband speed. With Roku Media Player, Plex, Emby or Jellyfin, a NAS can stream 4K content to a Roku TV or smart TV even when the internet is down, as long as the TV and server are on the same local network. A good NAS also helps with large libraries, multiple devices and, on stronger models, transcoding formats your TV cannot play natively. For online 4K services, a NAS does not solve buffering. Those streams need enough internet bandwidth and a stable home network. The practical baseline is about 25 Mbps per 4K stream, but 100 Mbps is a safer household target, and 200 to 500 Mbps is often the sweet spot for homes with several devices. A modern router, strong Wi‑Fi or, better, Ethernet to the TV can matter as much as the plan itself. If your goal is flawless playback of personal 4K files, buy the NAS and make sure your local network is solid. If your goal is flawless streaming from commercial apps, spend on faster broadband and better networking gear before considering a NAS. In many homes, the best setup is both: broadband for online services, NAS for local media reliability.

1 articles · Updated · Engadget · Jul 14

Roku TVs and many streaming boxes can still play media offline through USB drives, local-network storage and over-the-air TV, even when internet service is down.
Roku Media Player is central to most workarounds, but it must be downloaded before an outage; supported formats include MP4, MOV, M4V, MKV and WebM.
A PC or NAS can also feed content over the same local Wi-Fi network without internet, while external drives need compatible formatting such as FAT32, NTFS, exFAT or HFS+.
Plex, Emby and Jellyfin offer a more polished offline media-server option on Roku, and smart TV owners can add a $15 to $60 antenna for local channels.