Good news, LC! For steam cooking or descaling, this oven already has a built-in water reservoir that you simply need to pre-fill.
To locate the water reservoir, please follow the instructions on pages 17–18 of the user manual:
https://downloadcenter.samsung.com/content/UM/201904/20190417152704793/NV51K6650DS_DG68-00854A-03_EN-MES-CFR.pdf
If you require further assistance in the future, please do not hesitate to reach us through the channels listed 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
Please provide us with this reference number (1145169778) to help our team pull up your information when you message us.
Thank you for choosing Samsung. Have a wonderful day!
—Vannesa