In the era of cloud storage and messaging apps, physically transferring data between devices in the same apartment or office often becomes routine. Users are accustomed to sending documents to themselves via Telegram or uploading them to Google Drive to later download on another device. However, this method has critical drawbacks: speed is limited by the provider's plan, and data privacy is questionable. A local network created by your Wi-Fi router, allows you to organize data exchange at the maximum speed available to your wireless adapter, bypassing the Internet channel.
Using a local area network (LAN) provides a huge speed advantage, especially when working with large video files or database backups. Modern standards Wi-Fi 5 (802.11ac) And Wi-Fi 6 (802.11ax) Provides sufficient bandwidth for streaming 4K video without buffering. When configured correctly, you can work with files on a remote computer as if they were on your hard drive. This not only saves time but also frees up your internet bandwidth for other tasks.
In this article, we'll explore proven file sharing methods that work reliably on Windows operating systems. We'll cover both built-in operating system tools and third-party utilities that automate the process. You'll learn how to create shared folders, configure access rights, and use the FTP protocol for professional data management.
Preparing equipment and checking the network
Before configuring the software, you need to ensure the physical infrastructure is ready. All computers involved in data exchange must be connected to the same router. This can be a wired connection via an Ethernet cable or a wireless connection via Wi-FiIt's important that the devices are on the same subnet, which usually happens automatically when connecting to a home router.
Check the network type in your operating system. Windows may classify a new connection as "Public" by default, which blocks your computer from being visible to other devices for security reasons. You need to change the network profile to "Private" or "Home." You can do this through network settings or the Control Panel. Without this step, further sharing settings will have no effect.
- 📡 Make sure the Wi-Fi indicator on both computers is active and showing a connection.
- 🔗 Check that both devices have received IP addresses from the same router (usually starting with 192.168.xx).
- 🛡️ Temporarily disable third-party antivirus programs with the "Network Protection" feature if they block local connections.
To diagnose the connection, use the built-in command line utility. Open a terminal and enter the command ping with the IP address of the second computer. If you receive a response, the physical layer and core network layer are working correctly. If packet loss occurs, the problem may be a weak Wi-Fi signal or firewall settings.
⚠️ Attention: If you're using a guest Wi-Fi network (Guest Network) on your router, devices on it are isolated from each other by default. To transfer files, connect computers to the main network.
Setting up Windows Sharing (SMB)
The most native data transfer method is using the SMB (Server Message Block) protocol built into Windows. This method doesn't require installing any additional software, but it does require careful security settings. First, you need to enable network discovery. Go to Control Panel → Network and Internet → Network and Sharing Center and select "Change advanced sharing settings".
In the menu that opens, find the "Private" profile (or "Current Profile"). Here, you need to enable network discovery and file and printer sharing. Pay special attention to the "All Networks" section. For a comfortable experience without constant password prompts (on a secure home network), you can enable password-protected sharing, although for maximum security, it's recommended to use user accounts.
After enabling the services, you need to select the folder you want to make available to other users. Right-click the folder, select "Properties," and go to the "Sharing" tab. Click "Advanced" and check "Share this folder." You can also configure permissions here: allow read, modify, or full access for specific users or the "Everyone" group.
To access a shared folder from another computer, open File Explorer and enter the IP address of the first computer in the address bar in the format \\192.168.1.XXIf the system prompts you for credentials, enter the username and password you use to log in to the first computer. This ensures that only authorized users have access to the files.
☑️ SMB Setup Checklist
Using an FTP Server for Advanced Users
FTP (File Transfer Protocol) is the de facto standard for transferring large amounts of data. Unlike SMB, it is less dependent on Windows domain settings and often performs more reliably in heterogeneous networks, including Linux, macOS, and Android devices. To set up an FTP server on a Windows computer, you can use the built-in IIS service or third-party lightweight servers, such as FileZilla Server.
Let's consider the installation option FileZilla Server, as it provides a convenient graphical interface for managing users and access rights. After installation, you need to create a new user in the "Users" section, set a password, and specify the paths to the directories that will be accessible. In the Shared folders settings, you can specify detailed permissions: read, write, delete, and rename.
A key advantage of FTP is the ability to configure passive and active connection modes, which helps bypass NAT issues on your router. If you plan to access files not only from your local network but also from the internet (via a WAN), you'll need to forward ports in your router settings. Typically, port 21 is used for commands and a range of ports is used for data transfer in passive mode.
| Protocol | Speed | Security | Difficulty of setup |
|---|---|---|---|
| SMB (Shared Access) | High | Average (depending on passwords) | Low |
| FTP | Very high | Low (open data) | Average |
| SFTP/FTPS | High | High (encryption) | High |
| HTTP (Web Server) | Average | Depends on HTTPS | High |
To connect to the FTP server on the client computer, you can use any browser or a specialized FTP client, for example, FileZilla Client or Total Commander. In the address bar, enter the address in the format ftp://192.168.1.XXThis method is especially convenient for regular backups or working with media libraries.
Why can FTP be faster than SMB?
FTP has lower packet overhead when transferring large sequential files. SMB spends more resources checking access rights and metadata for each small file fragment, which can reduce overall throughput on congested Wi-Fi networks.
Specialized software for fast transfer
If you don't want to mess around with Windows access rights and FTP ports, programs that create their own P2P network over a local connection can help. The leader in this niche is the utility Resilio Sync (formerly known as BitTorrent Sync) or an open source equivalent SyncthingThese programs use the BitTorrent protocol to synchronize folders between devices.
The main advantage of these solutions is that they eliminate the need for a central server or complex router setup. Simply install the program on both computers, add a folder, and scan a QR code or enter a connection key. The program will automatically find devices on the local Wi-Fi network and begin synchronization at the maximum available speed.
Another great option is the program Dukto or its modern forks. This is the most simplified solution: launch it, see the name of another computer in the list, drag and drop the file. No folders, no settings, no passwords (within the local network). It's ideal. a tool for quick, one-time file transfers weighing up to several gigabytes.
- 🚀 Resilio Sync — ideal for constantly synchronizing work folders between PCs.
- 🔄 Syncthing — completely open source, highly secure, works without servers.
- ⚡ Dukto — the best program for instant transmission "here and now" without settings.
⚠️ Attention: When using third-party software, make sure your Windows Firewall settings allow these applications to communicate over private networks. Antivirus software often blocks them on first launch.
Solving speed and visibility issues
A common issue when transferring files over Wi-Fi is unstable speeds or computers suddenly disappearing from the network list. This is often due to the wireless adapter's power-saving settings. Windows may attempt to conserve power by temporarily disabling the adapter or reducing its power, which can lead to connection drops when transferring large files.
To fix this, go to Device Manager, find your Wi-Fi adapter, open its properties, and go to the Power Management tab. Uncheck "Allow the computer to turn off this device to save power." This simple step often stabilizes the connection and increases the average data transfer speed.
It's also worth paying attention to the frequency range. If your router is dual-band (supports 2.4 GHz and 5 GHz), make sure both computers are connected to the 5 GHz network. The 2.4 GHz band is heavily congested with neighboring routers and household appliances, causing interference and speed drops. The 5 GHz band offers a clearer and wider data channel.
If your computers can't see each other, try resetting your network settings. In Windows 10 and 11, you can do this through Settings: Network and Internet → Advanced network settings → Network resetAfter rebooting, the system will reinstall network drivers and reset TCP/IP protocol settings to factory defaults, which resolves many software conflicts.
Local data exchange security
Although a local network is considered a more secure environment than the global internet, you shouldn't neglect security. If an attacker connects to your Wi-Fi (for example, through a WPS vulnerability or a weak password), they will gain access to all shared resources. Therefore, the first line of defense is a strong Wi-Fi password and the use of encryption. WPA2/WPA3.
When setting up sharing, always use the principle of least privilege. If you just need to transfer a movie, create a temporary folder with read-only permissions rather than sharing the entire C: drive. After the transfer is complete, it's best to disable sharing or close the ports if you used an FTP server.
For particularly sensitive data, use encrypted archivers (such as 7-Zip with AES-256 encryption) before sending it over the network. Even if a file is intercepted within the network, its contents will remain inaccessible without a password. This is especially important in offices or apartment buildings, where network access is theoretically possible.
Is it possible to transfer files if the computers are on different routers?
Yes, but this will require setting up a VPN server (such as OpenVPN or WireGuard) on one of the routers or using programs like Tailscale/ZeroTier, which create a virtual local area network (VLAN) over the internet. This way, the computers will "think" they're on the same network, despite the physical distance.
Why is the Wi-Fi speed lower than stated on the router box?
Actual speed is always lower than theoretical due to protocol overhead, signal strength, the number of connected devices, and interference. Furthermore, Wi-Fi speed is divided equally among all active clients. If a router promises 1200 Mbps, that's the combined speed for both bands (2.4 and 5 GHz), but in reality, any one client will receive less than half.
How do I find out the IP address of a computer to connect to?
Open command prompt (cmd) and enter the command ipconfigFind the "IPv4 Address" line in the section for your active connection (Wi-Fi or Ethernet). You can also often see the IP address in the Network and Sharing Center by clicking on the connection icon.
Is it safe to leave sharing enabled all the time?
On a home network with a strong Wi-Fi password, the risks are minimal. However, in public spaces or offices with a large number of employees, it's recommended to enable sharing only during work hours and disable it afterwards. Also, regularly update your Windows account passwords.