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Testing your SD Card for errors

H2TestW Program

Sometimes you may have issues with your SD card for your printer. The easiest way is to delete all the files on the card and test it with H2TestW. This is a Windows utility that is free that will test the entire space on the card for errors. This will tell you if the card is defective or not. This guide will show you how to use H2TestW. This page is for Windows users only. If you are not on windows, check out the F3 (linux) or F3X (mac) pages from 3ds.hacks (third party site).

You will need to download the H2TestW file before proceeding with this guide.

Important Notes Before You Start the Test

  • If you have multiple partitions on the card (aka if you used it for OctoPrint) these need to be removed and it only have one partition.
  • This will also identify “fake” SD cards that claim to be a higher capacity than they physically are
    • 50% of the “8GB” SD cards that came from Creality failed the capacity test.

Visual Steps


Failed Test Example
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