For a 16TB personal media library in 2026, the math has flipped. A home NAS costs $700-900 in hardware, $40-60 a year in electricity, and holds the data forever with no egress fees. A cloud storage plan costs $6-7 per terabyte per month, which is $1,150-1,350 a year for 16TB, plus egress fees on every read. Over five years, the NAS lands at $1,000-1,200 total. The cloud lands at $5,750-6,750. The NAS is cheaper. The cloud is the right answer for backup, offsite redundancy, and access from anywhere, but it is not the right answer as a primary replacement for local storage at the 16TB scale.

The break-even depends on three numbers: how much you store, how often you read it back, and whether you already have a NAS. Below 2TB, the cloud is cheaper because the NAS hardware and electricity overhead dominate. Between 2TB and 8TB, it is a wash once you account for the time cost of managing the NAS. Above 8TB, the NAS is consistently cheaper, and the gap widens every year you keep the data. This guide walks through the real 2026 cost numbers for both options, the case for using both, and the right answer for different storage scales.

What "NAS" and "cloud" actually mean in 2026

A home NAS in 2026 is a small dedicated computer with multiple hard drives, typically running Synology DSM, TrueNAS, or Unraid, accessible from your home network and optionally from the internet through a VPN or reverse proxy. The hardware cost has fallen to the point where a 4-bay Synology DiskStation DS225+ with 16TB of usable storage (four 8TB drives in RAID 5) costs $700-900 in 2026, and the drives last 5-7 years. The electricity is $40-60 a year for an always-on home unit, depending on the drives and the CPU. The total 5-year cost is $900-1,200, plus the time cost of initial setup, which is 2-4 hours for a Synology, longer for TrueNAS or Unraid.

Cloud storage in 2026 splits into three pricing tiers. Cold storage, AWS S3 Glacier Deep Archive, Backblaze B2, and Wasabi, is $1-7 per terabyte per month with variable egress. Hot storage, AWS S3 Standard, Google Cloud Storage, is $20-23 per terabyte per month with $90 per terabyte egress. Free-tier or hybrid, Cloudflare R2, Backblaze B2 with annual commitment, Google Cloud Free Tier, can drop to $5-15 per terabyte per month with no egress in specific cases. The right tier depends on how often you read the data back and how urgently you need it.

At a glance

FieldDetail
NAS hardware (4-bay, 16TB usable)$700-900 (Synology DS225+ + 4x 8TB Ironwolf)
NAS 5-year total$1,000-1,200 (hardware + $40-60/yr electricity)
NAS break-even point2TB to 8TB stored, depending on read pattern
Cloud cold storage (16TB)$96-112/month ($1,150-1,350/year) Wasabi or Backblaze B2
Cloud hot storage (16TB)$320-368/month ($3,840-4,420/year) AWS S3 Standard
Cloud 5-year total (cold, 16TB)$5,750-6,750
Right answer for primary storage above 8TBNAS
Right answer for backup, offsite, anywhere-accessCloud
Right answer for sub-2TBCloud, the NAS overhead is not worth it

The 16TB cost math, in detail

The table below shows the real 2026 cost of storing 16TB for five years, broken down by option. The numbers use the most current 2026 retail prices for hardware and the published 2026 storage rates for the cloud providers. Read every column. The cloud "egress" line is the part that gets you.

OptionYear 1Year 2Year 3Year 4Year 55-year total
NAS (Synology DS225+ + 4x 8TB Ironwolf)$850$50$50$50$50$1,050
Cloud cold (Backblaze B2, no egress)$1,334$1,334$1,334$1,334$1,334$6,672
Cloud cold (Wasabi, 90-day min retention)$1,152$1,152$1,152$1,152$1,152$5,760
Cloud hot (AWS S3 Standard, low egress)$3,940$3,940$3,940$3,940$3,940$19,700
Hybrid: NAS primary + Backblaze B2 backup$1,400$440$440$440$440$3,160

The NAS line assumes a $700 Synology DS225+ with four 8TB Seagate Ironwolf drives at $150 each ($600 in drives, $100 in the enclosure), and $50/year in electricity. The cloud cold lines use the 2026 published rates, $6.95/TB/month for Backblaze B2, $5.99/TB/month for Wasabi, both with zero egress fees for the B2 free-egress allowance or the Wasabi no-egress policy. The AWS S3 Standard line uses $23/TB/month for storage and $0.09/GB for egress, with the egress line assuming 100GB/month of reads. The hybrid line is the right answer for most homes, and it costs $3,160 over five years, which is 55 percent of the cheapest pure-cloud option.

Where the cloud is cheaper

The cloud is cheaper when the storage is small, the read pattern is unpredictable, and the user has no time to manage hardware. The break-even numbers, in 2026 dollars, are the following. Below 2TB, cloud cold storage is cheaper than a NAS because the NAS hardware overhead is fixed at $700-900. The 2TB cloud cost is $140-170 a year, which is the NAS electricity cost alone, and the cloud has no setup time and no hardware failure risk. The 2TB NAS 5-year cost is $1,000-1,200, the 2TB cloud 5-year cost is $700-850. Cloud wins.

Between 2TB and 8TB, the answer depends on read pattern. If you read the data back often enough that the cloud egress fees start to add up, the NAS wins. If you read it back rarely and the egress is within the free allowance, the cloud is competitive. For most homes in this range, the deciding factor is whether the time cost of NAS setup is worth saving $200-400 over five years. For non-technical users, the cloud is the right answer. For technical users who already have a NAS, adding more drives is cheaper than the cloud.

Above 8TB, the NAS is consistently cheaper, and the gap widens. The hardware cost is fixed, the electricity scales linearly with the number of drives, and the cloud cost scales linearly with the storage amount. The slope of the NAS line is shallower than the slope of the cloud line above 8TB, which is the geometric reason the gap widens. The crossover depends on the local electricity rate, the cloud provider, and the read pattern, but in 2026 retail prices, the crossover is somewhere between 4TB and 8TB for a typical home.

Where the NAS is cheaper

Above 8TB, the NAS is consistently cheaper than the cloud, even with zero read activity. The reason is that the NAS hardware cost is a one-time purchase, and the cloud cost is a monthly subscription. A 16TB NAS in 2026 costs $700-900 in hardware, and the cloud cold storage for 16TB costs $1,150-1,350 a year. The NAS pays for itself in 8-10 months. After that, every year is pure savings.

The NAS also has hidden cost advantages. There is no egress fee, ever, on data you read from your own NAS. There is no minimum retention period (Wasabi charges for 90-day minimum even if you delete sooner). There is no API request fee. There is no rate limit. And there is no risk that the cloud provider changes its pricing model and breaks your budget. The NAS is the closest thing to "data I own forever" that the consumer market offers in 2026.

The NAS has hidden disadvantages too. The hardware fails. The drives fail. The power goes out and the UPS battery runs out and the filesystem gets corrupted. A NAS that is not backed up is not a backup. The 3-2-1 backup rule, three copies, two different media types, one offsite, applies to NAS data as much as to anything else, and a NAS is one of those three copies, not all of them.

5-year cost: NAS vs cloud for 16TB Cumulative USD. Lower is better. NAS is the cheapest by year 2. $20K $15K $10K $5K $0 Y1 Y2 Y3 Y4 Y5 AWS S3 Standard Backblaze B2 Wasabi NAS + B2 backup NAS alone Source: 2026 retail NAS hardware + electricity; Backblaze B2, Wasabi, AWS S3 2026 published rates
5-year cumulative cost of storing 16TB. The NAS pays for itself in year 1 and is essentially flat after that. Cloud storage scales linearly. The hybrid (NAS primary + Backblaze B2 backup) is 55% of the cheapest pure-cloud option over 5 years.

The right answer for most homes: NAS primary, cloud backup

The right architecture for a home media library above 8TB is a NAS as the primary storage and a cloud backup as the offsite copy. The NAS gives you fast local access, no egress fees, and full control. The cloud backup gives you the offsite copy that protects against fire, flood, theft, and ransomware. The combined 5-year cost for a 16TB deployment is $3,160, which is less than the cheapest pure-cloud option, and you get the data-ownership benefits of the NAS plus the disaster-recovery benefits of the cloud.

Synology DiskStation DS224+
Synology DiskStation DS224+, the 2-bay NAS that pairs with a Backblaze B2 cloud backup for a 3-2-1 deployment, is the right answer for most homes in 2026. (Synology)

The implementation. A Synology DS225+ or DS425+ with 4x 8TB Seagate Ironwolf drives, $700-900 in hardware. Synology Hyper Backup or Duplicati for the local-to-cloud sync, both free. Backblaze B2 at $6/TB/month for the offsite copy, which is $96/month for 16TB. The cloud backup is incremental, so the 16TB only uploads the changed blocks, and the first backup takes a week over a typical home internet connection. Subsequent backups take minutes.

The 3-2-1 deployment. Copy 1: the NAS, 16TB, in your home. Copy 2: the cloud backup, 16TB, on Backblaze B2. Copy 3: a second copy, either on a USB drive that you store offsite or on a second NAS at a relative's house. The third copy is the part most people skip, and it is the part that protects against the scenario where both your home and Backblaze's data center are unavailable at the same time, which is rare but not impossible.

Cloud providers worth using in 2026

Three cloud providers are worth the time in 2026 for a home NAS backup. Backblaze B2 is the most popular choice for personal NAS backup, with the Synology integration built into Hyper Backup, no minimum retention, $6/TB/month, and 3x free egress. Wasabi is cheaper per terabyte at $5.99/TB/month but has a 90-day minimum retention penalty that can negate the savings if you delete or rotate data often. AWS S3 Glacier Deep Archive is the cheapest at $0.99/TB/month but has retrieval fees of $0.02-0.10/GB that make it expensive if you ever need to read the data back. For a home media library backup, Backblaze B2 is the right default.

Cloud backup providers like Backblaze B2 are the right offsite copy for a home NAS
Cloud backup providers like Backblaze B2 are the right offsite copy for a home NAS, with $6/TB/month rates and 3x free egress. (Backblaze or Wasabi)

Cloudflare R2 is the new entrant in 2026, with zero egress fees and $15/TB/month storage. The zero egress is the headline feature, but the storage is more expensive than Wasabi. For a workload that reads as much as it writes, R2 is the best option. For a pure backup workload that rarely reads, Backblaze B2 is still the right answer. The 3x free egress allowance on B2 covers most personal NAS backup read patterns.

What to skip in 2026

Skip AWS S3 Standard for any home workload. At $23/TB/month and $0.09/GB egress, it is 3-4x more expensive than the alternatives for a use case where the cost difference is real money. The exception is if you are already deeply integrated with the AWS ecosystem, in which case S3 is the path of least resistance, but you should still consider Wasabi for the data you do not need S3-specific features for.

Skip the "lifetime cloud backup" offers from consumer backup services. Backblaze Computer Backup at $7/month per computer is the right answer for backing up a single computer, but it is not a NAS backup. It backs up the computer, not the NAS. For the NAS, use B2 directly. Skip the consumer "unlimited" cloud storage offers from Apple, Google, and Microsoft. The fine print caps the usable storage at 2-5TB, and the terms of service can change.

Who should pick which

Sub-2TB personal storage, use the cloud. The NAS overhead is not worth it. Google One, iCloud+, or OneDrive at $3-10/month is the right answer. Between 2TB and 8TB, the answer depends on your technical comfort and how often you read the data. For most homes, the cloud is still the right answer, with a personal Backblaze B2 backup at $5-15/month. Above 8TB, the NAS is the right primary, with a Backblaze B2 backup as the offsite copy. For 50TB and above, the NAS is the only answer that makes financial sense.

One last note. The 16TB threshold is for personal media in 2026. As drive capacities grow and cloud prices fall, the break-even will shift. In 2026, 8TB is the crossover. In 2028, with 30TB drives at $400 each, the crossover might be 15TB. The right answer is the one that fits your current data and your current budget, not the one that will be right in three years. Buy what you need now, and re-evaluate when the storage doubles.

Frequently asked questions

Is NAS cheaper than cloud storage in 2026

Yes, above 8TB of stored data. The NAS hardware is a one-time $700-900 purchase. The cloud storage for 16TB is $1,150-1,350 per year, forever. The NAS pays for itself in 8-10 months and is pure savings after that.

What is the NAS break-even point

Between 2TB and 8TB, depending on the read pattern and the cloud provider. Below 2TB, the cloud is cheaper. Above 8TB, the NAS is consistently cheaper. The exact crossover depends on your electricity rate, your cloud provider, and how often you read the data back.

Is cloud storage safer than a NAS

Yes and no. Cloud providers have geographic redundancy, professional security teams, and uptime SLAs that no home NAS can match. A home NAS is at risk of fire, flood, theft, ransomware, and power surge. The right answer is both, NAS for primary access, cloud for offsite backup.

What is the 3-2-1 backup rule

Three copies of the data, on two different media types, with one copy offsite. For a home media library, the three copies are the NAS (in your home), the cloud backup (offsite), and a second physical copy (USB drive or second NAS). The rule protects against the scenario where two copies are unavailable at the same time, which is rare but not impossible.

How much does Backblaze B2 cost for NAS backup

$6/TB/month for 2026, with 3x free egress. A 16TB backup is $96/month or $1,152/year. The first backup takes a week over typical home internet. Subsequent backups are incremental and take minutes.

Should I use AWS S3 or Backblaze B2 for personal backup

Backblaze B2. S3 Standard is 3-4x more expensive for the same data. S3 Glacier Deep Archive is cheaper but has retrieval fees that make it expensive to read the data back. B2 is the right answer for personal NAS backup in 2026.

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