In today's digital world, the need to quickly exchange data between devices is constant, whether transferring work projects or backing up personal archives. Using external hard drives or flash drives often feels inconvenient and slow, especially when both devices are on the same network. Wireless technology enables automatic and transparent data exchange, eliminating unnecessary physical handling of storage media.
Establishing a local connection requires careful configuration of network settings, but the results are worth it: you can instantly access files from one PC to another. This process doesn't require extensive programming knowledge, but it does require careful adherence to instructions for changing security and access settings. Synchronization via Wi-Fi - This is a fundamental skill for effectively using home or office infrastructure.
Before moving on to specific steps, it's important to ensure your equipment is ready for use. Your router should support data transmission standards sufficient for your needs, and your computers' network adapters should be functioning correctly. In this article, we'll cover all setup steps, from basic connection testing to setting up complex data replication schemes.
Preparing equipment and checking the network
The first step is to ensure a stable physical connection between the devices and the access point. Both computers should be connected to the same wireless network, preferably within range. 5 GHz To ensure high-speed transfer of large amounts of data. If one computer is connected by cable and the other by air, this is also acceptable, but may require additional firewall configuration.
You should check that the network type in your operating system is set to "Private" or "Home," not "Public." In a public profile, the system blocks device discovery for security reasons, preventing a direct connection. Open your network settings and ensure "Make this computer discoverable" is enabled.
Use the built-in command line utility to diagnose the connection. This will help rule out driver or signal issues before attempting complex setup.
ping 192.168.1.10 -tReplace the example above with the IP address of the second computer. If packets are sent and received without loss, the physical connection is working properly. If there's a timeout, check your router settings; Wi-Fi client isolation may be enabled, preventing devices from seeing each other.
⚠️ Attention: Some routers have a feature called "AP Isolation" or "Client Isolation," which by default prevents devices on the same Wi-Fi network from exchanging data. Make sure this option is disabled in your router's wireless settings.
It's also worth updating your wireless adapter drivers to the latest version available on the manufacturer's website. Older software may not work correctly with new encryption protocols or power saving standards.
Setting up sharing in Windows
After checking the connection, you need to configure the operating system to allow external access. In the Control Panel, find "Network and Sharing Center" and go to "Change advanced sharing settings." This is where you'll find the key switches that determine your PC's visibility.
In the current network profile (Private), enable "Turn on network discovery" and check "Turn on file and printer sharing." This will allow other computers on the network to see your device and request access to its resources. Without these settings enabled, all future connection attempts will fail.
To simplify access in a home environment where all users are trusted, you can enable password-protected sharing. However, for maximum security, it's best to use password-protected accounts. If you disable password protection, anyone connected to your Wi-Fi will be able to access shared folders.
- 📁 Open File Explorer, select the folder, right-click and select Properties.
- 📁 Go to the "Access" tab and click the "Advanced Settings" button.
- 📁 Check the box "Share this folder" and set the necessary permissions.
- 📁 In the Security section, make sure that the Everyone group or a specific user has read or change permissions.
It's important to distinguish between "Read" and "Modify" permissions. If you grant read-only access, a user on another computer will be able to copy files but won't be able to delete or modify them. Synchronization often requires full permissions.
Windows may ask you to confirm changes to security settings. Agree to apply the new rules. The folder will then become accessible over the network, and its icon will change to indicate it's shared.
Connecting to a shared resource by IP address
The most reliable way to connect to another computer is to use its IP address, as computer names on the network may not resolve correctly. First, find out the local IP address of the target computer by opening the command prompt and entering the command ipconfigFind the line "IPv4 address", it usually looks like 192.168.xx
On the second computer, open File Explorer and enter two backslashes followed by the IP address of the first computer in the address bar. The syntax will look like this:
\\192.168.1.55After pressing Enter, the system will attempt to connect to the specified host. If all settings are correct, you will see a list of all shared folders and printers. When you first connect, Windows may prompt you for credentials: the username and password of the user whose folder is shared on the remote PC.
For ease of use, we recommend mapping the network folder to a local drive letter. This will allow you to work with remote files as you would with regular files on your hard drive. In the network folder's context menu, select "Map network drive," select an available drive letter, and confirm.
⚠️ Attention: Local IP addresses assigned by a router via DHCP may change after a router reboot. For consistent operation, it is recommended to configure a static IP address in the router or in the network adapter properties.
If the system reports that the computer cannot be found, check whether SMB 1.0 support is enabled (although this is less secure) or, conversely, whether your antivirus software is blocking the connection. In modern versions of Windows 10 and 11, the SMB 1.0 protocol is disabled by default due to vulnerabilities, and the network operates on SMB 2.0/3.0.
Using automatic synchronization programs
Manually copying files can be tedious and error-prone when file versions on different computers become mixed up. To automate the process, it's best to use specialized software that tracks changes in real time and instantly updates data across all devices.
One of the best solutions is the program SyncthingIt operates on a P2P basis, without requiring a central server, and encrypts traffic. After installation on both computers, you need to exchange device IDs. This is done through the program's web interface, accessible at 127.0.0.1:8384.
- 🔄 Install the application on both PCs and launch it.
- 🔄 Add a new device by entering its unique ID obtained from another computer.
- 🔄 Accept the connection request on the second device in the program interface.
- 🔄 Create a sync folder and specify the path to it on both devices.
The advantage of this approach is that synchronization occurs automatically when both computers are online. You don't need to remember to copy files. The program automatically detects which files have changed and transfers only the delta (changes), saving bandwidth.
Why is Syncthing better than the cloud?
Syncthing stores data only on your devices, without uploading it to third-party servers. This ensures complete privacy and is independent of internet speed, as data transfer occurs directly over your local network.
Another option is to use Resilio Sync, which operates on a similar principle but has a more user-friendly interface for beginners. However, for basic synchronization within a local network, Syncthing's functionality is more than sufficient, and it's completely free.
Organizing synchronization via a home server (NAS)
If you need centralized data storage accessible from any device in your home, including TVs and smartphones, it makes sense to consider setting up a NAS (Network Attached Storage). This could be a separate device or an old computer dedicated to file storage.
In the operating system Windows You can deploy a software NAS using Family Sharing or simply by sharing the disk array. For more advanced users, installing specialized operating systems, such as TrueNAS or OpenMediaVault, which provide professional management tools.
| Parameter | A regular Windows folder | Dedicated NAS | Cloud service |
|---|---|---|---|
| Access speed | Depends on Wi-Fi | Maximum (gigabit) | Depends on the provider |
| Availability | Only when the PC is on | 24/7 | 24/7 |
| Price | For free | Purchase of equipment | Monthly subscription |
| Privacy | High | Maximum | Average |
When setting up a server, it's important to properly configure a RAID array to protect data from the failure of one of the hard drives. Synchronizing two computers with a NAS is transparent: you work with files on the network drive, and changes are immediately saved to the central storage.
Troubleshooting connection errors and problems
Even with proper configuration, situations may arise where computers stop communicating with each other. One common cause is a system or antivirus update that resets the network profile to "Public." Check the network type first if you lose access.
The problem could also be related to your power settings. Windows may disable the wireless adapter to save power, which causes the connection to drop. Go to Device Manager, find your Wi-Fi adapter, open its properties, and in the Power Management tab, uncheck the box next to Allow the device to turn off.
Windows Firewall or third-party antivirus software may be blocking ports required for the SMB protocol (usually port 445). Try temporarily disabling the firewall for diagnostic purposes. If the issue is resolved, create a rule allowing incoming connections for File and Printer Sharing.
⚠️ Attention: Operating system interfaces and menu item names may vary depending on the Windows version (10, 11) and installed updates. If you don't find an exact match, search for synonyms or use the settings search.
In some cases, resetting your network settings can help. In the network settings, there's a "Reset Network" button that reinstalls your network drivers and returns all settings to factory defaults. You'll then need to re-enter your Wi-Fi password.
☑️ Diagnostic checklist
Security when synchronizing data
Openly sharing files on a local network carries potential risks, especially if your Wi-Fi is accessible to others. Be sure to use a strong password on your Wi-Fi network with WPA2 or WPA3 encryption. A weak password allows an attacker to connect to the network and access your shared folders.
It is recommended to create separate accounts for network access with limited privileges. Do not use the administrator account to share folders unless absolutely necessary. The principle of least privilege will mitigate damage in the event of a compromise of one of your devices.
Keep your operating system updated regularly. Many viruses, such as WannaCry, spread through vulnerabilities in the SMB protocol. EternalBlue vulnerabilityThe network exploited by this virus was closed by Microsoft, but only for those who installed updates. Ignoring security updates makes synchronization dangerous.
If you use guest Wi-Fi to connect personal devices, ensure the guest network is isolated from the main network where computers with sensitive data are located. This will prevent guest smartphones from accessing your shared resources.
Is it possible to sync computers via Wi-Fi Direct without a router?
Yes, Wi-Fi Direct technology allows you to connect devices directly, bypassing the router. However, this feature is poorly implemented in Windows and is mainly used for projectors and printers. For full file synchronization between PCs, it's more convenient to create a virtual access point (Mobile Hotspot) on one computer and connect the other to it.
Why is the Wi-Fi copying speed slow?
Speed depends on the Wi-Fi standard (n, ac, ax), distance from the router, presence of obstacles, and air traffic congestion. Actual speed is often 50-60% of the theoretical speed. For large files, it's best to use a cable or Wi-Fi 6 (802.11ax) with a 160 MHz channel.
How do I turn off sync and sharing?
To stop access, simply click "Remove access" in the folder's properties on the "Sharing" tab. You can also disable network discovery in the Network and Sharing Center or temporarily disable the Wi-Fi adapter.