That USB port on the back of your WiFi router is not just decoration. Depending on the model, it can turn a spare hard drive into shared network storage, stream movies to your TV, share an old printer with every computer in the house, keep you online with a cellular modem when your internet goes down, or simply charge a phone. Here is what each option does, how to set it up and where the limits are.
First, check what your port can do
Not every router USB port is equal. Some mesh systems include a USB port that only provides power or is reserved for future use. On routers that do support USB features, the port type sets a ceiling on speed: USB 2.0 tops out at 480 Mbps in theory, while USB 3.0 and newer ports allow up to 5 Gbps. In practice, the router’s processor is usually the real bottleneck, so even a fast port will not match a dedicated network storage box.
To see your options, log in to the router’s web interface or app and look for a menu called USB, USB Application, Advanced Sharing or similar. If you find nothing, your model probably does not support data features.
1. Network storage for the whole house
Plug in a USB flash drive or external hard drive, and the router can share it over your home network using SMB, the same file sharing protocol Windows and macOS use. Every computer on your WiFi can then open it like a shared folder.
- ASUS: the feature lives under USB Application, with AiDisk and Servers Center offering Samba and FTP sharing plus per folder permissions.
- Netgear: it is called ReadySHARE. On Windows you open the readyshare network location in File Explorer, and Netgear keeps a list of compatible drives.
- TP Link: Archer routers list it under USB Sharing. You can reach the drive at tplinkwifi.net over SMB, and some models also support Mac Time Machine backups to the drive.
This works well for shared documents, family photo archives and automated backups. It is not a replacement for a real NAS if you need drive redundancy, heavy simultaneous use or video transcoding.
2. A media server for your TV and consoles
Most routers with storage sharing also include a DLNA media server, often listed as Media Server or Media Sharing. It scans the drive for movies, music and photos and offers them to DLNA compatible devices such as many smart TVs, game consoles and media player apps.
The catch is that routers do not transcode video. Your TV has to play the file format as it is. Standard HD files usually work fine, but large 4K files can stutter if the router or your WiFi cannot keep up. For a big library, a dedicated media server on a PC or NAS is the better tool.
3. Share a USB printer with every computer
If you have an older printer without built in WiFi, the router can act as a print server. ASUS offers a Network Printer Server menu with an EZ Printer Sharing utility for Windows and LPR setup for other systems. TP Link uses its USB Printer Controller utility for Windows and Mac, installed on each computer that needs to print. Netgear offered ReadySHARE Printer on some models, so check your manual.
Expect some friction. Every computer needs the printer driver, and multifunction scanning support is hit or miss. If your printer already has WiFi or Ethernet, connect it that way instead.
4. Cellular backup when your internet fails
Some routers can use a USB cellular modem, or a phone connected by USB tethering, as a second internet connection. ASUS calls this Dual WAN: in failover mode the router watches the main line and switches to the USB connection automatically when it drops, then switches back when it returns. ASUS also lets a phone share its mobile data with the router through USB tethering on supported models.
Cellular backup costs data and needs a compatible modem, so check your router’s supported device list before buying one. It makes the most sense for home offices, remote workers and anyone whose security cameras or smart home gear must stay online.
5. Charging in a pinch
Any powered USB port can top up a phone, earbuds or a small gadget. The USB 2.0 standard guarantees 500 mA and USB 3.0 guarantees 900 mA, so expect slow charging compared with a modern wall adapter. It is handy for powering a small USB light or keeping a device alive overnight, not for fast charging.
| Use | Best for | Main limit |
|---|---|---|
| Network storage | Shared files, simple backups | Router CPU speed, no redundancy |
| DLNA media server | Streaming to TVs and consoles | No transcoding |
| Printer sharing | Older USB only printers | Utility needed on each computer |
| Cellular failover | Home offices, always on gear | Modem compatibility, data costs |
| Charging | Small gadgets | Low power output |
FAQ
Is a router USB drive as good as a NAS?
No. It is fine for light sharing and backups, but a NAS offers faster transfers, multiple drives for redundancy, better apps and media transcoding.
Which file system should I use on the drive?
Check your router’s manual. Many routers read NTFS, FAT32 and exFAT, but support varies, and some handle large files better with one format than another.
Is it safe to access my router drive from the internet?
Only with care. Remote FTP exposes the drive at your public IP address. If you need remote access, use strong passwords and prefer a VPN, which many routers include.
Can I plug a USB hub into the router?
Some routers accept powered hubs, others do not. Check the support pages for your model before relying on one.
The verdict
A router USB port is a cheap way to add shared storage, simple media streaming, printer sharing or a backup internet connection without buying more hardware. Check what your model supports, lock down every sharing feature with a password, disable what you do not use, and upgrade to a proper NAS once your needs outgrow the router.
Updated October 2026: covers network storage, DLNA, printer sharing, cellular failover and charging, with security tips and ASUS, Netgear and TP Link specifics.
Featured photo: Misha Feshchak on Unsplash.
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