Quick answer: For small businesses that put security first, a network attached storage (NAS) device is often the better choice for storing and sharing files. A NAS keeps your data on hardware you own, inside your office, under your set rules. There is no third-party platform holding your files, no shared infrastructure, and no vendor account that an attacker can target to reach everything at once. With sound setup and an encrypted offsite backup, a NAS gives you the strongest control over who can touch your data.
What is a NAS?
A NAS is a small server with one or more hard drives, connected to your office network. Some examples of brands include; Unifi, Synology, QNAP, and Asustor. It shows up as a shared drive on your team's computers and phones. You create the user accounts, choose the folder permissions, and decide how files are shared. Think of it as a private cloud that you own.
Why is a NAS a strong choice for security?
You control where the data lives. Files sit on drives in your building, not on servers run by someone else. That makes it simpler to answer customers, insurers, and regulators who ask exactly where sensitive data is stored.
Fewer outside parties touch your data. Verizon's 2025 Data Breach Investigations Report found that third-party involvement in breaches doubled to 30%, often through misconfigured or insecure vendor systems. Every outside service in your file chain is one more thing you depend on but cannot fix yourself. A NAS shortens that chain.
You set the rules. You decide the password policy, the access schedule, which devices can connect, and how long files and logs are kept. You are not limited to the settings a provider chooses to offer.
Your data is not in a shared platform. Public cloud services hold millions of customers' files in one ecosystem. A NAS belongs only to you, so it is not an attractive single target for attackers who want to reach many businesses at once.
Costs do not push you toward weaker security. With a NAS you pay once for hardware, so there is no pressure to skip protections or limit user seats to control a monthly bill.
How does a NAS protect against ransomware?
Small businesses are heavily targeted. The same Verizon report found ransomware in 88% of breaches at small and medium-sized businesses, versus 39% at larger organizations (coverage here). A well-configured NAS helps in several ways:
- Snapshots save point in time copies of your files, so you can roll back after an attack or mistake.
- Immutable backups can be locked so they cannot be altered or deleted for a set period.
- Access controls limit each employee to the folders they need, which contains the damage if one account is compromised.
- Activity logs show who opened, changed, or deleted files.
What does a secure NAS setup look like?
A NAS is only as secure as its configuration. A Unit 42 analysis found roughly 250,000 QNAP and Synology devices exposed to the public internet, and criminals scan for them. Follow these steps:
- Keep the NAS off the open internet. Use a VPN or the manufacturer's secure relay for remote access.
- Remove default accounts and use unique, strong passwords.
- Turn on multi-factor authentication for every user.
- Update firmware and apps promptly.
- Encrypt shared folders and drives so stolen hardware reveals nothing.
- Enable snapshots and immutable backups.
- Use RAID for drive failures, remembering that RAID is not a backup.
- Follow the 3-2-1 backup rule: three copies, on two types of storage, with one offsite and encrypted.
- Review user access quarterly, and remove departing employees the same day.
Frequently asked questions
Is a NAS more secure than cloud storage?
It can be, because you control the hardware, the settings, and who has access. The advantage depends on good configuration and regular updates.
Can employees reach a NAS from home?
Yes. The safest methods are a VPN or the vendor's secure relay service, rather than opening ports on your router.
Does RAID replace a backup?
No. RAID protects against a failed drive, not ransomware, deletion, theft, or fire.
What if the office is lost to fire or theft?
Keep an encrypted offsite backup, either a second NAS at another location or a cloud backup that only you hold the keys to.
Who should manage the NAS?
Assign one trained employee or use a managed IT provider to handle updates, user access, and backup checks.
The bottom line
If protecting your data is the priority, a NAS gives a small business ownership, control, and a smaller attack surface. Lock it down with a VPN, multi-factor authentication, encryption, snapshots, and an encrypted offsite backup, and it becomes a secure foundation for storing and sharing files.