‘H2TESTW’ – Memory Card Speed Tester For Windows

H2TESTW is a program for testing the read-write speed of sd card and other devices through a PC. It is available for free and you don’t need to do any installation. Also, it is very simple and easy to use. You can scan either the whole device or some amount of data.

In the realm of storage devices like SD cards, ensuring the integrity and authenticity of the device is crucial. This is where tools like H2TESTW come into play. This comprehensive guide will provide insights into what H2TESTW is, how it works, and its advantages.

What is H2TESTW?

H2TESTW is a free software tool primarily designed to test the capacity and integrity of storage devices such as SD cards, USB flash drives, and other memory devices. Developed by a German software company, it’s renowned for its ability to detect counterfeit or corrupted storage devices.

Features of H2TESTW

  • It supports all versions of Windows Operating Systems- Windows XP, Vista, 7, 8, 10.
  • Help in checking the errors.
  • Determine the actual memory size of device.
  • Allows you to do scanning of almost all types of devices.

Using H2TESTW to Test SD Card Speed

Follow the below steps for testing sd card speed:

Step 1: At first, launch the program.

Step 2: Next, click on the “Select target” button to choose the folder to write files.

Step 3: Then, set the value of “Data volume” which specifies the count of files that can be written to the location specified.

Step 4: At last, for checking your sd card, click on the button “Write + Verify“.

Thus, with the help of H2TESTW you can analyze the performance of any of the device which is connected to your PC, either it is HDD, SSD, USB Flash Drive or MicroSD. Make sure your Operating System is able to identify your storage device correctly.

Download the H2TESTW program from the link.

Memory Card Tester

How Do I Test My SD Card with H2TESTW?

Using H2TESTW is straightforward:

  1. Insert your SD card into your computer using an appropriate adapter or slot.
  2. Download and run H2TESTW (no installation is needed).
  3. Select your SD card from the “Select target” dropdown.
  4. Click “Write + Verify” to begin the testing process.
  5. Upon completion, H2TESTW will provide a report detailing the integrity and actual capacity of the SD card.

How Do I Open a Corrupted SD Card?

  1. Connect the SD card to your computer.
  2. Go to ‘My Computer’ or ‘This PC’ and locate the SD card.
  3. Right-click on the SD card icon and select ‘Properties.’
  4. Navigate to the ‘Tools’ tab and click ‘Check.’ Windows will scan and repair any found errors.

Why My SD Card Cannot Be Detected?

Several reasons can lead to an SD card not being detected:

  • Physical damage to the SD card.
  • Corrupted card data.
  • Outdated or incompatible card reader drivers.
  • The card format isn’t supported by the device.

How Do I Fix My SD Card That Cannot Be Detected?

  1. Check Physical Connections: Ensure the SD card is properly inserted.
  2. Update/Reinstall Drivers: Go to ‘Device Manager,’ locate the card reader, and update or reinstall its drivers.
  3. Check on Another Device: Test the SD card on another computer or device.
  4. Format the SD Card: If the card is detected but inaccessible, consider formatting it (this will erase all data).

How Do I Check My H2TESTW SD Card Speed on My Computer?

While H2TESTW primarily checks for integrity and actual capacity, the time it takes to write and verify data provides an indirect measure of the SD card’s speed. For direct speed tests, you might consider tools like CrystalDiskMark or ATTO Disk Benchmark.

How Do I Test the Write Speed of My Micro SD Card?

  1. Insert the micro SD card using an appropriate adapter.
  2. Download and run a benchmark tool like CrystalDiskMark.
  3. Select the micro SD card and initiate the test.

How Do I Test the Write Speed of My Micro SD Card?

  1. Insert the micro SD card using an appropriate adapter.
  2. Download and run a benchmark tool like CrystalDiskMark.
  3. Select the micro SD card and initiate the test.

Benefits of H2TESTW:

  • Reliability: Trusted by professionals to detect counterfeit devices.
  • Easy to Use: User-friendly interface with no installation needed.
  • Detailed Reporting: Provides a comprehensive report on the state of the storage device.
  • Versatility: Can test various storage devices beyond SD cards.

Is H2TESTW Safe?

Yes, H2TESTW is safe to use. However, always ensure you download it from a reputable source to avoid counterfeit or malicious versions.

Is H2TESTW Free?

Yes, H2TESTW is a free tool. There’s no cost associated with downloading or using it.


H2TESTW has emerged as an indispensable tool for those seeking to validate the integrity and authenticity of their storage devices. Its ease of use combined with its meticulous testing process makes it a go-to choice for both professionals and casual users.

Always remember to back up any essential data before testing or formatting your SD cards. Thus, H2TESTW program is very helpful when you want to test a new storage device or check the older device for errors.