Looking for a Manga/Manhwa leaves his world and goes to a world where he has powers

You seem to be looking for The Second Coming of Gluttony by Ro Yujin and Ahn Jonghyeok

He was an addict, a loser, a despicable human being. But, one fleeting dream that may not have been a dream at all reawakens his once-lost senses. Possessing a very unique ability, he would use that, and the dream, to forge his path in the world now known as the Lost Paradise.

The MC is approached by this woman and he gets flashbacks like he met her before.

And they all have to open a box/satchel that they have that represents what their standing is

Most people don't get a satchel, some of them have the bronze one, a few the silver grade and the MC has gold.

The MC is also able to see everyone else’s stats and abilities.

And they are task with escaping this room

He has to escape through the hole in the ground to get to the second story of the school.