HearthCardCheck

HearthCardCheck — Free Download. Memory Card verification

For users needing to confirm the actual capacity and integrity of SD cards, microSD cards, or USB flash drives, HearthCardCheck provides a rigorous testing solution. The application writes a unique positional pattern across the entire storage device and then reads it back to detect discrepancies. This process identifies counterfeit cards that falsely report larger sizes than their physical memory allows. The software verifies every block, distinguishing genuine storage from fake media that causes data loss. HearthCardCheck measures real capacity, reports read and write speeds, and can repair a fake drive by creating a partition limited to the verified memory size. The verdict delivered is straightforward: the device is authentic, or it is counterfeit and here is the actual storage limit.

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Download HearthCardCheck (Official links)
File size: 166 MB
The latest version of HearthCardCheck is: 1.0.0
Operating system: Windows
Languages: English, Japanese, Dutch, Polish, German, French, Spanish, Italian, Portuguese
Developer: Hearth Software
Price: $1.00 USD (Commercial product)
  • Capacity Verification. The core function writes a verifiable pattern to every block on the card. Each block is stamped with its own exact position. Reading back the data shows where the memory controller has wrapped writes around to earlier sectors. The count of correctly returned blocks reveals the true, reliable storage capacity of the device. This method catches counterfeit cards that report 64GB but physically contain only 8GB.
  • Counterfeit Detection. The program compares the data written against the data read back. A genuine card returns every block exactly as written. A fake card returns wrong data for blocks beyond its real physical limit. HearthCardCheck calculates the exact point where corruption begins, which is the actual end of the real memory chip. The result is a clear fake or genuine verdict.
  • Device Repair. After measuring the exact real capacity, the software can repair a fake card. It removes the original partition table and creates one new partition that fits only the verified genuine memory space. This prevents Windows from ever writing to the fake region again. The repaired card becomes reliable at its true, smaller size. Repairing is destructive and requires administrator confirmation.
  • Read and Write Speed Test. During the verification process, the application measures the time taken for write operations and read operations. It reports the average sequential speed in megabytes per second. This data helps identify not only fake cards but also genuine cards that are wearing out or performing far below their class rating. The speed report shows whether the card is still suitable for high-bitrate video recording.
  • Health Assessment. HearthCardCheck evaluates the error rate and speed consistency during testing. Bad sectors, read retries, and large speed drops indicate physical wear or controller failure. The software reports whether the device looks healthy or is failing. This function gives a warning before a card fails completely in a camera or phone.
  • Three Testing Depths. Users can choose between three levels of thoroughness. A quick sample tests random areas to give a fast estimate. The first 8GB mode verifies the most commonly used space. The full verification mode checks every byte on the device. The deep mode provides the most accurate capacity and health result but takes the longest time.
  • Partition Inspection. The program lists the current partition layout on the selected device. It shows the file system, the total reported size, and the allocated space. Users can see if the card has multiple partitions or a suspicious setup. This helps identify cards that were pre-formatted by sellers with fake capacity metadata.
  • Secure Data Wipe. Because verification writes to every part of the card, the process also functions as a thorough data wipe. The original file system and all user data are overwritten. After the test, no recoverable files remain on the tested area. This makes the tool suitable for preparing a card for sale or disposal.
  • Administrator Mode Operation. For repair functions and full access to the physical drive, the application requests elevation. It runs with the minimum required privileges for testing, but partitioning requires administrator rights. The software uses Windows API calls to lock the volume and write directly to the disk handle. This ensures proper access to removable media.
  • Local Processing. All testing happens on the local machine. No data about the card, its files, or the computer is uploaded to any server. The application requires no account creation and does not include analytics. Verification results are displayed only to the user. The software works fully offline after installation.
  • Multi-Language Support. The interface is available in 18 languages. The language can be changed without restarting the program. This includes all messages, warnings, and the verification report. The program selects the operating system language by default and allows manual override.
  • Free Trial Mode. A trial version is available through the Microsoft Store. The trial allows running a limited verification to see the interface and results format. Full capacity testing and repair require a one-time purchase. The paid version has no time limits and no subscription fees.

The development of HearthCardCheck began in 2025 as a response to widespread counterfeit memory cards sold online. The developers, a small team based in Europe, created the first version in C++ using the Win32 API for direct disk access. The project started when the team members lost personal photo collections to fake microSD cards. Early builds focused only on detecting false capacity by writing a sequential pattern. The repair function was added in version 2.0 after users requested a way to make counterfeit cards usable for non-critical data.

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