Hi Lily,
The washer uses a 3 prong grounding plug.
Please see page 18 of the user manual for the electrical supply and grounding requirements.
https://downloadcenter.samsung.com/content/UM/202407/20240725164005396/OID67143_IB_WA7100C_EN.pdf
Should you still need support with your dryer, please don’t hesitate to reach out to us through the channels below.
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
When you message us, provide us with this reference number (1149073641), and it will help our team pull up your information.
^Rodel