Greetings!
We are happy to answer your question about this Samsung washing machine model.
We highly recommend using High Efficiency (HE) detergent for your washing machine model. You can use any of that you have mentioned (Liquid, Powder, POD) as long as it is HE detergent that does not contain natural ingredient like vinegar or baking soda.
I have shared a Samsung link below for guidelines on the detergent.
How to use detergent in your Samsung washing machine:
https://www.samsung.com/us/support/answer/ANS10001018/
Should you have additional questions, please feel free to get back to us via the following options:
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, please provide us with this reference number 1148086928 to help our team pull up your information.
Leo