Modern local networks allow you to exchange files between devices without using flash drives or cloud storage. Shared folder via WiFi — is the most efficient way to transfer large amounts of data, such as 4K movies or system backups. Transfer speeds on a local network are often limited only by the capabilities of your router and network cards, making this method significantly faster than most cloud services.
To successfully organize data exchange, it is necessary to understand the basic principles of the protocol. SMB (Server Message Block) and properly configure access rights in the operating system. Errors during the initial configuration can result in computers simply not "seeing" each other in the network environment. In this article, we'll walk you through the step-by-step process of creating, configuring, and connecting to shared resources, as well as troubleshooting common security issues.
The main advantage of this approach is complete independence from external servers. Your data remains within the perimeter of your router and don't leave the local network, which is critical for confidential information. Furthermore, you don't need to pay for a cloud service subscription or rely on your internet provider's speed.
Preparing equipment and checking the network environment
Before diving into complex Windows settings, make sure your physical and logical infrastructure is ready to go. All devices that need to access files must be on the same subnet. This means that if your router assigns addresses in the range 192.168.1.x, then all computers must have IP addresses starting with 192.168.1.
A common mistake is connecting one device to a guest WiFi network and another to the main network. Guest networks are isolated by software, and devices on them cannot communicate with each other for security reasons. Make sure the network profiles on all computers are marked as "Private" or "Home," not "Public."
- 📶 Make sure all devices are connected to the same SSID (name) of the WiFi network.
- 🔌 Check the signal stability: for transferring large files, it is better to use the 5 GHz band.
- 🔢 Write down the IP address of the computer where the shared folder (server) will be stored.
To get the IP address, use the command line. Click Win + R, enter cmd and press Enter. In the window that opens, enter the command ipconfigFind the "IPv4 address" line—this is the number you'll need to connect from other devices.
⚠️ Attention: If you have a dynamic IP address, it may change after rebooting your router. In this case, connecting using the computer name may fail, and you'll have to search for the address again. For consistent operation, it's best to configure a static IP in your router settings.
Setting access rights and opening a port for a folder
The most important step is configuring the folder itself that you want to share. Windows blocks external file access by default, so you need to explicitly allow network communication. Find the desired directory, right-click it, and select "Properties."
Go to the "Access" tab and click "Advanced." Check "Share this folder." Below, click "Permissions." In the window that opens, you can add specific users or the "Everyone" group if you want any device on the network to be able to read the files.
Don't forget about the "Security" tab in the folder properties. Even if you've shared the folder, NTFS system permissions may block read access. Make sure the group list includes "Everyone" or a specific user with "Read and Execute" and "List Folder Contents" permissions.
☑️ Access Permissions Setup Checklist
There's an important caveat regarding passwords. By default, Windows requires a password to access shared folders. You can disable this request, but this will reduce security. If you decide to leave a password, make sure the account on the server computer has a password, otherwise the connection may fail.
Enabling network services and the SMB protocol
In modern versions of Windows, especially builds after 2018, some network services may be disabled by default for security reasons. For sharing to work correctly, you need to enable protocol support. SMB 1.0 (if using older devices) or make sure that discovery services are enabled.
Open Control Panel and go to Programs and Features. Select Turn Windows features on or off. Find SMB 1.0/CIFS file sharing support in the list. Expand this option and ensure that SMB 1.0/CIFS Client and SMB 1.0/CIFS Server are enabled (if you need to connect very old devices, such as old TVs or set-top boxes).
| Windows component | Default Status | When to turn on |
|---|---|---|
| SMB 1.0 Server | Disabled | Only for older NAS or TVs (before 2015) |
| SMB 1.0 Client | Disabled | To access old network storage |
| SMB Direct | Included | For high-speed networks with RDMA |
| Printing via HTTP | Disabled | Not required for file shares |
Also check the services. Click Win + R, enter services.mscFind the "Function Discovery Resource Publishing" and "Discovery Service Provider Host" services. Set their startup type to "Automatic" and start them. This will ensure the computer is visible in the network environment.
⚠️ Attention: The SMB 1.0 protocol is considered obsolete and vulnerable to ransomware. Enable it only if absolutely necessary for older hardware. For modern Windows 10/11 and macOS, use SMB 2.0 or 3.0.
Why is Windows blocking SMB 1.0?
The SMB protocol version 1.0 contains critical vulnerabilities that were exploited by the WannaCry virus to spread across networks. Microsoft has disabled it in security updates to protect users.
Connecting to a shared folder from another device
Once the server is configured, you can connect clients. Using an IP address is the most reliable method, as it eliminates DNS resolution errors. Open File Explorer on the client computer.
In the address bar, enter two backslashes and the IP address of the computer containing the folder. The format should be: \\192.168.1.55 (Replace the numbers with your IP address). Press Enter. If everything is configured correctly, the system will ask for a username and password (if they haven't been disabled) or will immediately open a list of available folders.
For added convenience, you can map a network folder as a separate drive. This will allow you to work with files as if they were on your hard drive. In File Explorer, click "This PC," then select "Map network drive" from the top menu.
- 💾 Select a free drive letter from the list (for example, Z:).
- 🔗 In the "Folder" field, enter the path:
\\IP address\Folder_Name. - ✅ Check the box "Reconnect at logon."
If you're using macOS or Linux, the process is similar, but the path syntax may differ. In Finder on your Mac, select Go -> Connect to Server and enter the address in the format smb://192.168.1.55Linux systems usually require entering the address in the file manager via the protocol smb.
Resolving Common Access and Visibility Errors
Even with proper configuration, users often encounter errors. One of the most common is "Windows cannot access...." This is often due to a security policy that prohibits passwordless guest logins. Blank passwords may be prohibited in the registry or group policies.
Another issue is your antivirus or firewall. Third-party antivirus programs (Kaspersky, ESET, Avast) have their own firewalls that can block incoming connections. Try temporarily disabling your firewall or adding your local network to the trusted list.
If the computers don't see each other in the Network section, check the Portable Hardware Enumeration Service. It should be running. Resetting network settings can also help. Open a command prompt as administrator and run:
netsh winsock resetnetsh int ip reset
ipconfig /flushdns
After running the commands, be sure to restart your computer. This will clear the DNS cache and reset the protocol stacks, which often resolves issues with stuck network interfaces.
⚠️ Attention: Windows settings interfaces and service names may vary slightly depending on the update version (21H2, 22H2, 23H2). If you can't find the item, search for keywords in system settings.
Security and speed optimization
Open file access creates a potential vulnerability. If an intruder connects to your WiFi, they can access your data. Therefore, it's critical to use a strong password on your WiFi network. WPA2/WPA3.
To optimize speed, make sure you're using a dual-band router. Transferring large files over the 2.4 GHz band will be slow and unstable due to noise in the air. Switch your computers to the 5 GHz network, where real-world speeds can reach 300-500 Mbps or higher.
It's also worth limiting access rights. Don't grant "Full Control" (write and delete) to all users unless absolutely necessary. It's best to create a separate "Network" account with a restricted password specifically for file sharing to prevent your core data from being compromised.
- 🔒 Use complex passwords for online accounts.
- 🚫 Disable the shared folder if it is not used for a long time.
- 📡 Place the router centrally to ensure the same signal level for all devices.
Regularly check access logs if your version of Windows or NAS allows it. This will help identify any unauthorized access.