Key takeaways
- NAS is ideal for shared files and backups
- Server storage is built for databases and applications
- Many businesses use both
- RAID protects against disk failure but isn't a backup
As data grows, keeping files on individual laptops or a single old server becomes risky. Two common options are network-attached storage (NAS) and dedicated server storage such as SAN or direct-attached arrays.
What a NAS does well
A NAS is purpose-built for file sharing. It's simple to manage, affordable and ideal for shared folders, departmental files and as a backup target. Modern NAS devices from Synology and QNAP also sync with the cloud and support remote access.
What server storage does well
Server storage is built for performance: databases, ERP systems, virtual machines and applications that need fast, consistent access. It offers features like high availability and tiered storage.
Questions to ask
To decide, consider:
- Is the data mainly files, or applications and databases?
- How many users access it at once?
- How much downtime can you tolerate?
- How fast is your data growing?
- Where will backups be stored?
Often, both
Many businesses use server storage for applications and a NAS for files and backups. The two complement each other.
Sizing your storage
Estimate current data, then plan for growth, typically 20–40% a year for many businesses. Allow extra capacity for snapshots and versioning, and remember that RAID uses some raw capacity for redundancy. Buying a device with empty drive bays makes future expansion simple.
Features worth having
When choosing storage, look for:
- Snapshots for quick recovery of deleted files
- Encryption of data at rest
- Role-based access control linked to your user accounts
- Cloud sync or backup integration
- Hot-swappable drives
- Monitoring and email alerts
Signs you've outgrown your current storage
Many businesses start with files on individual laptops, a USB drive or a consumer storage box. Warning signs that it's time to upgrade include staff emailing files to each other because there's no shared location, several versions of the same document, slow access when many people open files at once, running out of space, and no reliable backup. If losing a single device would mean losing important work, centralised storage should be a priority. Moving to a proper NAS or server storage brings everything into one managed, protected place.
Performance considerations
Storage performance depends on the drives, the network and the workload. Hard drives offer large capacity at low cost, while SSDs are much faster for databases, virtual machines and large numbers of small files. Many systems combine both, using SSDs as a cache. The network matters too: a fast NAS connected through an old switch won't perform well. For demanding workloads, 10 Gigabit connections between storage and servers remove bottlenecks. Sizing storage correctly for performance, not just capacity, keeps applications responsive as usage grows.
Planning migration
Moving files to new storage is a good opportunity to tidy up. Agree a folder structure with each department, archive old projects, remove duplicates and set permissions based on roles rather than individuals. Migrate in stages, starting with less critical folders, and keep the old location read-only for a short time in case anything was missed. Communicate clearly with staff about where files now live and how to access them from the office and remotely.
Protect it
Whichever you choose, use RAID for disk redundancy, but remember RAID is not a backup. Keep separate backups following the 3-2-1 rule.
Frequently asked questions
For most small and mid-sized offices, yes. A NAS handles file sharing more simply and cheaply.
RAID 5 or 6 balances capacity and protection for most NAS devices; RAID 10 suits performance-sensitive workloads.
Yes, securely through a VPN or the NAS vendor's encrypted remote access.
Typically three to five years in continuous use. Monitoring warns you before a drive fails.
