- Flapen Score
- 25 / 100Ranks 986 of 1,028 Computers & Accessories niches · −17 vs the category median of 4225
- Market size
- £47K/yr26K searches / yr
- 90-day growth
- -19.5%search demand this quarter
- Competition
- 67%top-5 click share · 3 brands · 274 sellers
Flapen Score
18tb against its category
The dotted line is the Computers & Accessories average. Past it, 18tb is stronger. Inside it, weaker.
Market
The 18tb market on Amazon at a glance
Shoppers on Amazon United Kingdom searched for 18tb 26K times last year and spent an estimated £47K. All 3 brands take every click. Demand peaks in Nov. Flapen scores it 25 out of 100, a Fail.
01 · Demand
0.6% of searches ended in a purchase last week.
Shoppers searched for this 26K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 0.6% of those searches ended in a purchase. Searches in the last 90 days moved -19.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated £47K a year.
- Searches, last 12 months
- 26K
- Growth, 90 days vs prior 90
- -19.5%
- Conversion, latest week
- 0.6%
- Market size, estimated
- £47Ka year
- Peak month
- November1.9× the quietest month
- Top search term
- 18tb hard drive13K searches a year
02 · Price
A sale here is worth £305.87.
Listings sell for £305.87 on average, from £227.49 to £419.69. Amazon reports units sold in ranges. This niche sold 250 to 500 a year. The average listing sells 0 to 100 of them. At £305.87 that is £0 to £31K a year per listing.
- Average price
- £305.87above the $15 to $100 sweet spot
- Price range
- £227.49–£419.69
- Amazon United Kingdom median price
- £12.12across 27,606 niches
- Units sold a year
- 250–500
- Units per listing a year
- 0–100
- Revenue per listing a year
- £0–£31K
- Returns
- 2.8%of orders · Amazon United Kingdom median 0.6%
03 · Entry bar
The bar here is reviews.
56% of listings pay for placement with sponsored ads. 72% ship with Prime. On an average day, 1.2% of listings are out of stock. The average listing ranks #77 within Data Storage. It carries 7,677 reviews at 4.23 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 56%
- Prime listings
- 72%
- Out of stock, average day
- 1.2%
- Average rank
- #77in Data Storage
- Average rating
- 4.23 starsAmazon United Kingdom average 4.36 stars
- Average reviews
- 7,677per listing
- Listings tracked
- 18
04 · Newcomers
Brands here are settling in.
The brands on the shelf have sold for 45 months on average, so the names here are settling in.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 45 months
Products
Top 18tb products & what they sell for
Every tracked product: its share of the shelf, its reviews, and its price.
Top sellers
by 90-day click share
WD 18TB My Book external hard drive Desktop HDD with Password Protection USB 3.0 SuperSpeed USB software for device management backup hardware encryption works with PC and Mac Black
- Price
- £279.04
- Rating
- 4.3/5
- Reviews
- 7,392
- Age
- 5y ago

WD 18TB Elements Desktop External Hard Drive - USB 3.0 Black
- Price
- £241.19
- Rating
- 4.6/5
- Reviews
- 19,698
- Age
- 5y ago

Seagate Exos X18 Enterprise Class 18TB Enterprise Internal Hard Drive SATA 3 5 6Gbit/s 128MB cache ((ST18000NM000J)
- Price
- £316.42
- Rating
- 4.0/5
- Reviews
- 674
- Age
- 5y ago

Seagate Expansion Desktop 20TB External Hard Drive USB 3.0 Data Rescue Services (STKP20000400)
- Price
- £272.38
- Rating
- 4.3/5
- Reviews
- 18,468
- Age
- 1y ago

Seagate Expansion Desktop 16TB External Hard Drive USB 3.0 Data Rescue Services (STKP16000400)
- Price
- £227.49
- Rating
- 4.3/5
- Reviews
- 18,468
- Age
- 6y ago
Trending
90-day click momentum
Seagate One Touch Hub 18TB External Hard Drive Desktop HDD USB-C & USB 3.0 port for Computer Desktop Workstation PC Laptop Mac (STLC18000400)
- Price
- £343.85
- Rating
- 4.0/5
- Reviews
- 2,730
- Age
- 4y ago

Seagate Exos 28TB internal server hard drive ST28000NM000C 3.5 HDD SATA 6Gb/s 7200RPM 512MB Cache (Renewed)
- Price
- £371.75
- Rating
- 4.2/5
- Reviews
- 128
- Age
- 1y ago

WD 16TB My Book external hard drive Desktop HDD with Password Protection USB 3.0 SuperSpeed USB software for device management backup hardware encryption works with PC and Mac Black
- Price
- £270.56
- Rating
- 4.3/5
- Reviews
- 7,392
- Age
- 5y ago

WD 18TB My Book external hard drive Desktop HDD with Password Protection USB 3.0 SuperSpeed USB software for device management backup hardware encryption works with PC and Mac Black
- Price
- £279.04
- Rating
- 4.3/5
- Reviews
- 7,392
- Age
- 5y ago

Western Digital Ultrastar DC HC550 Enterprise Hard Drive 18TB (3.5 SATA 6Gbps SAS 12Gbps 7200RPM 512MB Cache)
- Price
- £379.52
- Rating
- 3.7/5
- Reviews
- 183
- Age
- 6y ago
Newest
by launch date
Seagate Expansion Desktop 20TB External Hard Drive USB 3.0 Data Rescue Services (STKP20000400)
- Price
- £272.38
- Rating
- 4.3/5
- Reviews
- 18,468
- Age
- 1y ago

Seagate IronWolf Pro 20TB Enterprise Internal NAS HDD CMR 3.5 Inch SATA 6GB/s 7.200 RPM 256MB Cache for RAID NAS Rescue Services - Frustration Free Packaging (ST20000NTZ01)
- Price
- £412.84
- Rating
- 4.5/5
- Reviews
- 987
- Age
- 1y ago

Seagate Exos X22 22TB Internal Server Festplatte ST22000NM000C 3.5 Zoll HDD SATA 6Gb/s 512E SED 7200RPM 512MB Cache (Refurbished)
- Price
- £325.24
- Rating
- 4.2/5
- Reviews
- 183
- Age
- 1y ago

Seagate Exos 28TB internal server hard drive ST28000NM000C 3.5 HDD SATA 6Gb/s 7200RPM 512MB Cache (Renewed)
- Price
- £371.75
- Rating
- 4.2/5
- Reviews
- 128
- Age
- 1y ago

Seagate Enterprise 3.5 18000 GB 7200 RPM 18 TB 3.5 7200 RPM SATA ST18000NM00J (Renewed)
- Price
- £247.50
- Rating
- 4.2/5
- Reviews
- 156
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take 67% of clicks. Leaders hold, but buyers still shop past them.
Brands
3 flat
Sellers
274
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
67%
Top 20: 100%
Open market
0%
- Western Digital62%
- Seagate36%
- Toshiba3%
- Open — no brand owns it (0%)
Demand
18tb search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Nov · busiest ÷ quietest = 1.9×
Search terms
Top 18tb search terms shoppers use
The exact words shoppers type, with yearly volume, growth, and conversion.
- 18tb hard drive13K/yr
- 18tb6K/yr
- 18tb external hard drive4K/yr
- 18tb hdd4K/yr
Reviews and returns
What reviews say buyers love and hate about 18tb
What buyers praise, what they complain about and why they send it back, from the reviews.
Complain
Total failure
died after 7
Got 2 of the 3 disks failing within months
Ridiculously loud
Extremely loud
A bit noisy
I know that you don't get the full storage because of os and suff
Do not buy this if you have important data to store
NOT 20TB AFTER ALL
Its not cheap
Not really worth £345
gone up hugely in price
Doesn't feel rugged
probably due to how fragile these are
Love
easy to setup, decent transfer and access rates
the files copied easily and quickly
Good quality drive, fast speeds
Great value for 20TB of storage
Great capacity
Great value storage
durable
Great price, reliable so far (2 months)
After a couple of months of use, I've had no issues at all
Great value
worth it
For the size the price is excellent
Works as expected
As described
Disk is working as expected, no flaws,
Return
2.8% Return rate 0% Fixable by listing
Didn't work, returned
Seemed to upload stuff, but was unsearchable, then frequently simply failed to start, and then stopped working altogether
Occasionally the drive just stops backing up altogether
Ridiculously loud
Extremely loud
A bit noisy
Total failure
died after 7
Got 2 of the 3 disks failing within months
Keep looking
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Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common 18tb questions
Answered from the same tracked data.









