NAS Capacity Planning for Philippine Businesses: The Formula and What People Get Wrong

The most common NAS purchase mistake in Philippine SME offices: buying a 4-bay NAS with 4×4TB drives (16TB raw) for a team that currently uses 8TB of file storage. Within 12 months, the NAS is 90% full and performance has degraded. The team buys a larger NAS or adds drives — and the cycle repeats.

The root cause is calculating for current usage without accounting for: RAID redundancy overhead, snapshot space, growth projection, and backup storage. Once these are factored in, the correct raw capacity is typically 3–5× the current used data volume.

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The Capacity Planning Formula

Step 1: Current usable data volume

Measure the actual data your team currently stores. Not the drive space on laptops and desktops — the data that will live on the NAS. This includes:

• Active project files
• Document archives
• Design assets and media
• Application data (accounting, CRM if hosted on NAS)

Example: 8TB of active data currently stored across file servers and personal drives.

Step 2: RAID overhead

RAID reduces usable storage from raw drive capacity. Common configurations:

RAID level	Usable capacity	Example (4×8TB = 32TB raw)
RAID 0 (no redundancy)	100% raw	32TB — not recommended
RAID 1 (2-drive mirror)	50% raw	16TB
RAID 5 (3+ drives, 1 parity)	(N-1)/N × raw	24TB from 4 drives
RAID 6 (4+ drives, 2 parity)	(N-2)/N × raw	16TB from 4 drives
RAID 10 (4+ drives, mirror+stripe)	50% raw	16TB from 4 drives

Recommendation for Philippine SME:

• Under 20TB usable needed, 4 drives: RAID 5 (best space efficiency with one drive failure protection)
• Mission-critical data, any size: RAID 6 (tolerates two simultaneous drive failures — important given Philippine power quality, which accelerates HDD failure rates)
• Accounting/finance data: RAID 10 (best rebuild performance, important for data integrity during HDD failure)

Example: 8 drives of 8TB each = 64TB raw. In RAID 6: (8-2)/8 × 64TB = 48TB usable.

Step 3: Snapshot space reserve

Synology and QNAP NAS systems offer snapshots — point-in-time copies of file shares that protect against accidental deletion and ransomware (snapshots are read-only and separate from the live filesystem). Snapshots consume additional storage proportional to how frequently files change.

Snapshot space reserve guideline:

• Low-change data (archives, completed projects): reserve 10–15% of shared volume size
• Medium-change data (active projects, accounting): reserve 20–30%
• High-change data (VM storage, databases): reserve 40–60%

For a typical Philippine SME file server: Reserve 20% of usable capacity for snapshots.

Example: 48TB usable → reserve 9.6TB for snapshots → 38TB net for data.

Step 4: Growth projection

Philippine businesses with growing teams or accumulating data (design agencies, engineering firms, media production) should plan for 3–5 years of storage growth.

Annual data growth rates by business type:

Business type	Typical annual data growth
Professional services (consulting, legal)	15–30% per year
Architecture / engineering / construction	30–50% per year
Media / video production	50–100% per year
General office / accounting	10–20% per year
CCTV footage archive	Predictable: cameras × resolution × retention days

Example: 8TB current at 30% annual growth over 3 years: 8 × 1.3³ = 17.6TB needed at year 3.

Step 5: Backup storage

A NAS without a backup is a single point of failure. The 3-2-1 backup rule:

• 3 copies of data
• 2 different storage media
• 1 offsite copy

For a Philippine NAS deployment:

• Copy 1: Primary NAS (production)
• Copy 2: Secondary NAS or USB backup on-site
• Copy 3: Cloud backup (Backblaze B2, Wasabi, or Azure Blob — all cost-effective for Philippine businesses)

If the NAS will also host on-site backup (a common Philippine configuration — primary NAS + secondary backup volume on the same NAS): add 100% of the net data volume for backup capacity.

Step 6: Total raw capacity required

Working through the example:

• Year-3 data projection: 17.6TB
• Add snapshot reserve (20%): 17.6 × 1.25 = 22TB net usable needed
• Add on-site backup (if on same NAS): 22 × 2 = 44TB usable needed
• RAID 6 on 8-bay NAS: (8-2)/8 efficiency = need 44 ÷ 0.75 = 59TB raw minimum

For this scenario: 8-bay NAS with 8×10TB drives = 80TB raw → 60TB usable in RAID 6. This comfortably covers 3-year growth with backup.

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Synology vs QNAP: Which NAS Platform

Both Synology and QNAP are well-established in the Philippine market with local distributors.

Synology DSM advantages:

• Cleaner, more user-friendly interface — easier for non-IT staff to use
• Better enterprise features in DSM 7: Active Directory integration, Synology Drive (SharePoint-like), Synology Photos, native Cloud Sync
• Synology Hyper Backup — native backup to Backblaze B2, Azure, Google Drive, S3
• Stronger marketplace ecosystem — more reliable third-party packages

QNAP QTS/QuTS advantages:

• More flexible hardware options — more drive bay configurations and specialised models (thunderbolt, 2.5GbE, 10GbE built-in)
• QNAP Snapshots are more granular than Synology's in some configurations
• Better for iSCSI storage (connecting NAS as block storage to VMware or Hyper-V)
• QuTS Hero (ZFS-based) — better data integrity for mission-critical storage

Philippine recommendation for most SMEs: Synology DS923+ (4-bay), DS1522+ (5-bay), or RS1221+ (12-bay rack) — DSM's ease of use and Hyper Backup's cloud integration are the most practical combination for a Philippine IT team without a dedicated storage administrator.

For virtualisation-heavy environments (running VMs on the NAS): QNAP with QuTS Hero provides better block storage performance and ZFS data integrity.

See our Synology vs QNAP guide, NAS backup setup guide, and hybrid backup 3-2-1 guide for the implementation detail.

Related reading: Synology vs QNAP Philippines · NAS backup setup Philippines · Hybrid backup 3-2-1 rule Philippines · RAID levels explained Philippines

For Philippine businesses sizing and deploying NAS storage — Synology and QNAP available through Technica Solutions Inc. — get in touch.

Talk to our I.T. Hardware team →