As long as your refrigerator has no nasty smells and is cold, I think you will be fine, like she said. Kosher Salt, not regular table salt. She didn't mention rinsing the steak before cooking. I would not add more salt or a seasoning with heavy salt before cooking, maybe some Blk Pepper?
I have only salted steaks for about an hour before cooking but I may try this to a couple of good thick cuts.
Go for it and let us know your thoughts after cooking!