A Reddit user bought a 2TB hard drive from Amazon. It arrived, plugged in, and Windows confirmed: 2TB of storage. Two weeks later, files started disappearing. When they cracked the case open, they found metal weights for heft and a tiny SD card soldered to a circuit board. The real capacity? 32GB.
This is not a rare edge case. It is one of the most common electronics scams on the internet, and it is getting worse.
How the Scam Works
Counterfeit storage devices use a simple trick: modified firmware. Scammers take a cheap flash chip — usually 4GB to 64GB — and reprogram the controller to report a fake capacity to your computer. When you plug in a "16TB SSD," Windows, Mac, and Linux all show 16TB of available space.
The device works normally until you exceed the real capacity. Then it starts silently overwriting old data or corrupting files. By the time you notice, your files are gone.
The physical presentation is convincing. Fake SSDs come in real-looking enclosures, sometimes with weight added to feel like a legitimate drive. Fake SD cards use genuine-looking branding and packaging. Fake USB drives look identical to real ones.
If a deal looks too good to be true — a 16TB SSD for $30, a 2TB SD card for $15 — it is fake. No exceptions. Check current real prices on BuyPerUnit to know what storage actually costs.
Where Fake Drives Show Up
Amazon
Amazon is ground zero for fake storage. A TechRadar investigation found that over half the search results for "16TB SSD" on Amazon were counterfeits. Many ship directly from Amazon warehouses via FBA (Fulfilled by Amazon), which gives them the Prime badge and makes them look legitimate.
The commingled inventory system makes it worse. Even if you order from a legitimate seller, Amazon may ship you a unit from a different seller's stock if it is the "same" product. This means fakes get mixed in with real drives.
Walmart
In a case that went viral on Reddit, Walmart sold a "30TB portable SSD" that turned out to be two small SD cards stacked inside a plastic enclosure. The listing had hundreds of reviews and appeared in normal search results alongside legitimate products.
AliExpress and Temu
These platforms are flooded with fake high-capacity drives. The prices are absurdly low — $8 for a "4TB USB drive" — but the product photos look professional and reviews are manipulated. Most listings use stock photos of real Samsung or SanDisk products.
How to Spot a Fake Before Buying
Check the price per GB. This is the single most reliable indicator. If a drive's price per GB is dramatically lower than everything else in its category, it is fake. Real 1TB NVMe SSDs cost $0.05-0.08/GB. Real 1TB SD cards cost $0.06-0.10/GB. Anything claiming 4TB+ for under $0.01/GB does not exist at consumer prices.
Check Real Storage Prices on BuyPerUnit →Check the brand. Stick to known manufacturers: Samsung, Western Digital, SanDisk, Seagate, Crucial, Kingston, SK Hynix, Sabrent. If the brand name is something you have never heard of (or a very slight misspelling of a real brand), walk away.
Check the capacity. As of 2026, the largest consumer SD cards are 1TB. The largest consumer portable SSDs are 4TB. The largest consumer external hard drives are 24TB. Anything claiming to exceed these limits at a budget price is fake.
Read the one-star reviews. Sellers can fake five-star reviews. But real buyers who got scammed leave detailed one-star reviews describing the exact problem: files disappearing, real capacity being a fraction of what was advertised, cheap plastic construction.
How to Test a Drive You Already Own
If you already bought a drive and want to verify it, use one of these free tools:
H2testw (Windows) — Writes data across the entire drive and verifies it can be read back. If the drive claims 1TB but only 64GB of data survives verification, you know it is fake. This is the gold standard test.
F3 (Mac/Linux) — The open-source equivalent of H2testw. Same write-and-verify approach.
FakeFlashTest (Windows) — A quicker test that writes patterns to detect capacity fraud without filling the entire drive.
Run H2testw or F3 on every SD card and USB drive you buy from marketplace sellers. The test takes a while on large drives, but it is the only way to know for certain that the capacity is real.
What to Do If You Got Scammed
- Stop using the drive immediately. Any data stored beyond the real capacity is already corrupted or lost.
- File a return. Amazon, Walmart, and most marketplaces accept returns for counterfeit products. Be specific in your return reason — select "counterfeit" or "not as described."
- Leave a review. Your one-star review with details about the scam helps other buyers avoid the same fake.
- Report to the FTC. If you are in the US, report marketplace counterfeit products at ReportFraud.ftc.gov.
Buy From Trusted Sources
The simplest defense against fake storage is to buy from reputable brands at realistic prices. If you know what storage actually costs per gigabyte, you can immediately spot deals that are too good to be true.
Compare Real Storage Prices Across Retailers →We track prices from Amazon, Best Buy, and Newegg — and only list products from verified brand storefronts. No random marketplace sellers, no too-good-to-be-true pricing, no fakes.