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Home Documentation New user manual for whatsminer asic APPENDIX 3.1 SD Card Formatting to FAT32
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APPENDIX 3.1 SD Card Formatting

This guide will help you properly format your SD card to the FAT32 file system using built-in Windows tools. This is necessary for correctly writing the firmware image.

Before you start:

  • Connect the SD card to your computer and ensure it is detected by the system.
  • Back up all important data — formatting will erase all contents.
  • If you are using a microSD adapter, make sure the write-protection switch is unlocked.
    MicroSD adapter unlocked write-protection switch
Step 1: Opening "Disk Management":
  • Right-click on the Start button (Windows logo).
  • Select "Disk Management".
    Windows Start menu Disk Management option
Step 2: Deleting Existing Partitions/Volumes:

Locate your SD card in the list of disks (typically labeled as "Removable").
Windows Disk Management SD card removable disk location

If the card has any existing partitions:

  • Right-click on each allocated partition/volume.
  • Select "Delete Volume...".
    Disk Management Delete Volume option for SD card partition
  • Confirm the volume deletion.
    Windows Disk Management delete volume confirmation dialog
  • If the SD card has multiple volumes, repeat for all volumes until the entire card space shows the status "Unallocated".
    SD card shows unallocated space in Disk Management
Step 3: Creating a New Partition/Volume:
  • Right-click on the unallocated space of the SD card.
  • Select "New Simple Volume...".
    Disk Management New Simple Volume on SD card
  • In the volume wizard that opens:
    1. Click "Next >" on each step.
      New Simple Volume Wizard welcome screen
    2. Specify the maximum volume size.
      New Simple Volume Wizard SD card volume size specification
    3. Assign a drive letter (e.g., F).
      SD card drive letter assignment screen
    4. Select the FAT32 file system and enable "Perform a quick format".
      SD card FAT32 quick format settings
    5. Click "Finish" to complete.
      New Simple Volume Wizard completion summary
Result:

After formatting is complete, the SD card should appear as a single partition with the FAT32 file system and have the status "Healthy (Basic Data Partition)".

The disk should look like this:
Disk Management SD card FAT32 healthy partition

SD card formatting is complete.