NAS & Backup / Practical guide
Network File Sharing Explained: SMB, NFS, NAS, P2P and Cloud
Understand peer-to-peer, centralized, and cloud file sharing, including where SMB, NFS, NAS, FTP, and SFTP fit and when to use each.
What Is Network File Sharing?
Network file sharing is simply a way to make files available to more than one device or user over a network. I’ve used different file-sharing setups for personal use and for companies, and the right method depends on who needs access, where the users are, and how much control you need.
The important point is that “file sharing” can describe different architectures. A Windows PC sharing a folder, a NAS serving SMB and NFS, and a cloud platform such as Google Drive are all file-sharing solutions, but they work very differently.
The 3 Main File-Sharing Models
1) Peer-to-Peer File Sharing
In a peer-to-peer setup, one computer shares files directly with another computer without a dedicated central file server. This is simple and cheap for a few devices, but it becomes harder to manage when the number of users grows.
A common example is Windows built-in file sharing. A Windows PC can act as an SMB server and share a folder with another device on the same network. SMB is the protocol doing the file sharing; peer-to-peer describes the architecture.
This works well for a small temporary setup, but the shared files depend on that computer being powered on and available. Permissions, backups, and auditing also become harder to manage across many separate PCs.
2) Centralized File Sharing
Centralized file sharing puts the shared data on one main server or storage device. Users connect to that system instead of keeping separate shared folders on multiple computers.
This is the model I prefer for a business network because user access, permissions, storage, backups, and monitoring can be managed from one place.
NAS
A Network Attached Storage (NAS) is one of the most common ways to build centralized file sharing. Synology and QNAP systems can serve folders to Windows, macOS, and Linux clients using protocols such as SMB and NFS.
If you want the actual setup steps, see my NAS file sharing and collaboration guide.
Windows Server
Windows Server is another common centralized option, especially in environments already using Active Directory. SMB shares can be combined with Windows permissions, groups, auditing, quotas, and other server features.
Linux and Samba
Samba is an open-source implementation of SMB commonly used on Linux and Unix-like systems. It allows Windows, macOS, and Linux clients to access shared folders using SMB.
The old term CIFS is still seen in interfaces and documentation, but modern Windows file sharing uses newer SMB dialects. Microsoft describes CIFS as an older dialect in the SMB family, so I would avoid treating SMB and CIFS as two equivalent modern protocols.
* For another comparison of centralized and peer-to-peer storage, keep this article as a reference.
3) Cloud-Based File Sharing
Cloud file sharing stores or synchronizes files through an online service. This is useful when users need access from different locations without running their own file server.
Examples include Google Drive, Microsoft OneDrive, SharePoint, Dropbox Business, and Zoho WorkDrive. Cloud file services usually make external access and collaboration easier, but you depend more on the internet connection, provider controls, storage limits, and subscription model.
Services such as AWS EFS, Azure NetApp Files, and Google Filestore are also cloud file systems, but they are infrastructure services rather than normal end-user collaboration platforms. They are usually used by applications, servers, and cloud workloads.
The Main File-Sharing Protocols
SMB
SMB (Server Message Block) is the main file-sharing protocol in Windows environments, but it is not Windows-only. Modern NAS devices, macOS, Linux, and Samba can all use SMB. It supports authenticated access to remote files and folders and is the protocol behind normal Windows network shares.
NFS
NFS (Network File System) is common in Linux, Unix, virtualization, and server environments. NAS devices often support both SMB and NFS so different clients can access the same storage through the protocol that fits the environment.
FTP and SFTP
FTP is mainly a file-transfer protocol rather than a normal mounted network file system. Plain FTP does not protect credentials and data in transit, so I would not use it for sensitive transfers over an untrusted network.
SFTP is a different protocol that runs over SSH and provides encrypted file transfer. Do not confuse it with “secure FTP” as if it were just an encrypted mode of the same protocol.
Which File-Sharing Method Should You Use?
| Situation | Good Starting Point |
|---|---|
| A few PCs sharing temporary files | Peer-to-peer SMB |
| Home with several devices and centralized storage | NAS with SMB |
| Small business with shared folders and permissions | NAS or Windows/Linux file server |
| Linux/server workloads | NFS or SMB depending on the application |
| Users in many locations | Cloud collaboration platform or controlled remote access |
| Simple encrypted file transfer | SFTP |
Security and Backup Still Matter
Whatever method you choose, avoid giving everyone full access just because it is easier. Use user or group permissions, remove anonymous access you do not need, keep the server or NAS updated, and disable old protocols that are no longer required.
Also remember that file sharing is not the same as backup. If everyone works from one central copy and that storage fails, gets encrypted, or someone deletes the wrong folder, you still need a separate recovery copy.
For a NAS environment, start with the NAS Backup Strategy Guide and then use the detailed Synology or QNAP backup walkthrough that fits your setup.
Conclusion
Peer-to-peer, centralized, and cloud file sharing all solve the same basic problem: giving multiple users or devices controlled access to files. The difference is where the data lives, who manages it, and which protocol or platform provides access.
For a small permanent environment, I usually prefer centralized storage because permissions, backups, and troubleshooting are easier to control. For remote collaboration, cloud services can make more sense. The right answer depends on the users, data, network, and recovery requirements.
