What a shared network folder is and why you'd use one

A shared network folder is a directory on one computer that other computers on the same network can access and edit. Instead of emailing files back and forth or using a USB drive, you create one folder that everyone with permission can open, add to, and modify in real time. The computer holding the folder stays on and connected; the others access it over your local network (WiFi or ethernet).

This works best for small teams, families, or offices where people are in the same building. It's faster than cloud storage for quick file swaps and doesn't require an internet connection. The tradeoff is that the "host" computer — the one storing the folder — needs to stay powered on while others are using it.

Key Takeaways

  • The computer hosting the folder must stay on and connected to the network while others access it.
  • On Windows, you right-click a folder, choose Properties, go to the Sharing tab, and click Share; on Mac, you use System Settings > General > Sharing and enable File Sharing.
  • You control who can access the folder by assigning user accounts and permission levels (read-only or read-and-write).
  • Other computers find the shared folder by browsing the network or typing the host computer's address into their file manager.
  • Shared folders work only when both computers are on the same local network; they don't work over the internet without additional setup.

Setting up a shared folder on Windows

Start by creating or choosing the folder you want to share. Right-click it and select Properties. Click the Sharing tab at the top, then click the Share button. A window opens showing your user account. Click Share again to confirm.

Windows then shows you the network path to your folder — something like \\YOURCOMPUTERNAME\FolderName. Other people on your network will use this path to find it. You can change the permission level for each user: click the dropdown next to their name and choose Read (view and copy files only) or Read/Write (view, copy, edit, and delete). When you're done, click Done.

If you want to stop sharing, go back to Properties > Sharing > Advanced Sharing, uncheck Share this folder, and click Apply.

Setting up a shared folder on Mac

On Mac, the process is different. Open System Settings (or System Preferences on older versions), then go to General and click Sharing. Look for File Sharing in the left menu and toggle it on. Click the + button to add a folder, then navigate to the folder you want to share and click Add.

You'll see the folder listed with a network address below it — usually something like smb://192.168.1.100/FolderName. To set permissions, click the folder name, then click the + button under "Users" to add specific people. Select each user and use the dropdown on the right to set them as Read Only or Read & Write. When finished, close the settings window.

Connecting to a shared folder from another computer

On Windows, open File Explorer and look for Network in the left sidebar. Click it to see computers on your network. Find the computer hosting the folder, double-click it, and you'll see the shared folder. Double-click the folder to open it. If prompted for a password, enter the username and password of an account on the host computer that has permission to access it.

Alternatively, you can type the network path directly. Press Ctrl + L in File Explorer to highlight the address bar, type the path (like \\YOURCOMPUTERNAME\FolderName), and press Enter.

On Mac, open Finder and click Go in the menu bar, then Connect to Server. Type the network address (like smb://192.168.1.100/FolderName) and click Connect. Enter the username and password when prompted, then click Connect again. The folder will appear on your desktop and in Finder's sidebar.

Troubleshooting connection problems

If you can't see the shared folder, first check that both computers are on the same WiFi network or connected to the same ethernet switch. The host computer must be powered on and not in sleep mode. On Windows, you may need to enable network discovery: go to Settings > Network & Internet > Advanced Network Settings > Advanced Sharing Options and turn on network discovery for your network type.

If you see the folder but can't open it, you may not have permission. Ask the person who set up the folder to check that your user account was added with the correct permission level. If you're entering a password and it's not working, make sure you're using the username and password of an account on the host computer, not your current computer.

On Mac, if you can't connect, try restarting the File Sharing service: go back to System Settings > General > Sharing, toggle File Sharing off, wait a few seconds, and toggle it back on. Then try connecting again.

When to use a shared folder versus other options

A shared network folder is fast and simple for small groups in one location, but it has limits. The host computer must stay on, and you can't access the folder from outside your local network (like from home if you're at the office). If you need to work from different locations or want automatic backups, cloud storage like Google Drive, Dropbox, or OneDrive is more practical.

Shared folders also don't track who changed what or when — there's no version history. If two people edit the same file at the same time, one person's changes may be lost. For teams that need those features, cloud storage or a dedicated file server is safer.

Frequently Asked Questions

Can I share a folder with someone outside my local network?

Not with this basic setup. Shared folders only work on your local network. To share with someone remotely, you'd need to set up a VPN (virtual private network) to connect them to your network first, or use cloud storage instead.

What's the difference between Read and Read/Write permissions?

Read-only means the person can open and copy files but can't edit, delete, or add new files. Read/Write means they can do everything — open, edit, delete, and create new files. Use Read-only for people who should only view files.

Why does the shared folder disappear when I turn off my computer?

Because the folder lives on that computer. When it shuts down, the network can't reach it anymore. If you need the folder available all the time, you'd need to leave that computer on, or move the folder to a dedicated file server or network-attached storage device.

Can I password-protect a shared folder separately from my user account?

No. Shared folders use your computer's user accounts for access control. The only password is the one for the user account on the host computer. If you want an extra layer of security, you can encrypt the folder itself using Windows BitLocker or Mac FileVault, but that's separate from sharing.

What if I want to share a folder with only one person?

You can. When you set up sharing, add only that person's user account and set their permission level. No one else will be able to access it, even if they're on the same network.