100% H2TESTW TESTED REPORT PER BATCH RE-VERIFY ON ARRIVAL

Every card tested. And you can check it yourself.

Counterfeit and over-spec'd cards are everywhere, and co-mingled marketplace stock means even a genuine listing can ship a fake. Our standard is simple: 100% H2testw capacity testing with a report on every batch — and a card you can re-verify the moment it arrives, so your distributor can prove real capacity to the end buyer.

Request a Sample to Test
100% test floor at the source factory where every card is capacity-tested
100%cards H2testw tested, not sampled
Per batchtest report ships with the order
Usable floorguaranteed minimum, in writing
No co-minglingstraight from the line, traceable
Testing refers to our source manufacturing partner's process; figures per batch report.

Why This Matters

The cheapest thing is the card. The most expensive thing is the footage you lost to a fake.

Buyers have stopped trusting capacity labels — firmware-faked cards report a size they can't hold and silently drop data once they fill up, and marketplaces mix genuine and counterfeit stock under one listing. A distributor can't win that argument with a sticker. They win it with proof: a test anyone can reproduce. That is exactly what we build into every order.

Tested, not trusted100% H2testw on the line — the number you sell is the number we measured.
Proof you can hand downPer-batch report + a test your buyer can re-run and match.
Clean chainSource-factory line to your door — never co-mingled marketplace stock.

Our Process

What "100% tested" actually means here

Not a sampled carton, not a marketing claim — the standard every order is built to.

01
Full-card H2testw

Every card written and verified across its whole capacity — the test that catches a firmware-faked size, run on 100% of units.

02
Guaranteed usable floor

We record and publish the minimum usable capacity after formatting — the honest figure, not the decimal label.

03
Per-batch report

The test results ship with the order, so the capacity is documented before it ever reaches your shelf.

04
Locked & traceable

Fixed BOM, locked part numbers, batch-traceable — no silent swap and no co-mingled inventory behind the result.

Re-Verify on Arrival

Check it yourself in four steps

Don't take our word for it — match our report. Here's the exact capacity check, the same one we run.

01
Download a capacity verifier

Use H2testw (Windows) or F3 (macOS/Linux). Both write test data across the whole card and read it back — the only reliable way to catch a firmware-faked capacity that a quick "Properties" check will miss.

02
Write and verify the full card

Point the tool at the freshly formatted card and let it fill 100% of the space, then verify. A genuine card writes and reads back every sector; a fake reports its advertised size but fails verification past its real capacity.

03
Read the result against our report

A real card returns "Test finished without errors" and a usable figure at or above the guaranteed floor on the batch report we ship with the order — e.g. a 64 GB card showing ~59,630 MB usable. Any "data error" or a capacity far below the report is a red flag.

04
Keep the report for your customer

Save the screenshot and our per-batch report. That is what lets your end buyer trust the capacity — the proof the marketplaces can no longer give them.

Want the deeper consumer-facing walkthrough (screenshots, F3, common gotchas)? See how to test a microSD for fake capacity.

Go Deeper

The proof, and the sourcing behind it

How to test a microSD for fake capacity

The full H2testw / F3 walkthrough, with what a pass and a fail look like.

Why a 128GB card shows 119GB

Decimal vs binary, and why honest usable capacity is lower than the label.

How to vet a flash-memory supplier

Traceability, testing and counterfeit checks before you buy in volume.

High-endurance microSD

The surveillance & dashcam line — tested, by grade and duty cycle.

FAQ

Testing & capacity — common questions

How do I check a microSD is the real capacity and not fake?
Run a full write-and-verify with H2testw (Windows) or F3 (macOS/Linux). These tools fill the entire card and read it back, which is the only way to expose a firmware-faked card that reports, say, 512 GB but only holds 32 GB. A genuine card finishes without errors at or above its guaranteed usable capacity; a fake throws data errors once you pass its real size. We run this on 100% of cards before they ship and include the batch report — and you can re-run it the moment the order arrives.
Do you test every card, or just a sample?
Every card — 100% H2testw capacity tested on the line, not a spot sample. Each order ships with a per-batch test report stating the guaranteed usable-capacity floor, so the figure you sell is the figure we measured, not a rounded marketing number.
Why does a 64 GB card only show about 59,630 MB — is that fake?
No, that is normal and honest. Manufacturers count capacity in decimal GB (1 GB = 1,000,000,000 bytes) while your operating system counts in binary GiB, and formatting reserves a little more. So a real 64 GB card shows roughly 59–60 GB usable. We publish the guaranteed usable floor in writing rather than hiding behind the decimal label.
How can my distributor prove authenticity to the end customer?
Hand down what we hand you: the per-batch H2testw report, the published usable-capacity floor, and the fact that any buyer can re-run H2testw themselves and match it. Because our stock comes straight from the source-factory line — never co-mingled marketplace inventory — there is a clean, traceable chain from the wafer to the end buyer.

See For Yourself

Request a sample and test it before you commit

We'll send a sample batch with its test report — run H2testw yourself and match the numbers before you place a volume order.

Request a Sample Request a Quote

B2B inquiries only. Sample terms confirmed per configuration.