Hello, does anyone know how I downgrade to 9 without MicroSD?

Please tell us some basic information before asking for help:

  1. Model Name: Zenfone Max Pro M1(ZB602KL)
  2. Firmware Version: QKQ1.WW_Phone-17.2017.2004.424-20200414
  3. Rooted or not: NO:

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Maybe with some adb command?

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