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How to Test the MicroSD Card's Speed

Updated April 17, 2017

All MicroSD cards are definitely not created equal. Many unbranded MicroSD cards are available at a fraction of the cost that name brand cards require. If you have questions about the card's performance, download free software to test the speed of your MicroSD. Many new mobile phones use MicroSD storage, so it is very important to have a card with fast transfer rates to prevent sluggish performance. If you experience sluggish performance, a simple test might pinpoint your problem.

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  1. Download and install free speed-testing software (see Resources).

  2. Back up any important files you have on your MicroSD card. The free software will write new information to your card throughout the testing process, so this is important to prevent any data loss.

  3. Connect your MicroSD card to the computer on which you installed the testing software. You will need a MicroSD card adaptor, which will allow the card to fit inside normal flash card readers. Insert your card and adaptor into your flash card reader.

  4. Open the free testing software. Select your language preference at the top of the window. Click the "Target" button and navigate to the location of your MicroSD card. Once your card is selected, click the "Write + Verify" button at the bottom of the window. When testing is finished you will receive a pop-up with the results.

  5. Analyse the results of the test. You will be shown the reading and writing speeds of your card. It will also let you know if you have any errors, or possible problems with the MicroSD card. You can copy and paste these results into a text document if you want to save them for later reference.

  6. Tip

    The software can be used to test any compact flash card or USB drive for speed and problems.


    Always back up important data when testing any drive to avoid accidental data loss.

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Things You'll Need

  • MicroSD card adaptor
  • Flash card reader

About the Author

Located in southeastern Kentucky, Charles Judd began writing semi-professionally in early 2005 for local publications. His work has been published in his hometown newspapers, the "Jackson Sun" and the "Jackson Times." He has many diverse interests and enjoys writing about various subjects. Charles holds a Bachelor of Science in industrial machine technology.

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