When you're at home, you can configure the Trek as a wireless range extender to fill in dead spots, or as a wireless bridge to support clients such as older Smart TVs, Blu-ray players, or AV receivers that require a hardwired network connection. Just don't forget to take it with you when you hit the road again.
The Trek has one USB 2.0 Type A port that can be used to share a portable hard drive over your network. I much prefer Netgear's Readyshare software for sharing files on a USB hard drive attached to the router. Using an SMB server, you can easily copy multiple files or entire folders over your network. The Trek also has an FTP server for sharing large files over the network or over the Internet.
You can also use that USB port to charge another USB device, such as a smartphone or media player--when the router is plugged into power. Unlike the D-Link and TP-Link devices, however, the Trek does not support USB cellular modems (although Netgear's website indicates that the model sold in China and Russia does).
The Netgear Trek supports UPnP, but it doesn't have a DLNA-certified media server. If you consider media streaming a critical feature, you might be happier with D-Link's DIR-510L. But I don't imagine that particular feature will be all that important to someone shopping for a travel router.
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