I know it's a long one but I need to ask...

Re: I know it’s a long one but I need to ask…

That’s the part I don’t get. All she said was to bring my backpack. I’m not sure if she’s also using one or just wants mine or who is going to be carrying it. It feels weird asking that.

About the locker, I asked and she said she’s the only one who has the key (and the bank of course). I asked if she thinks he might have made a copy and she said she put something to mark the box (an envelope or something) to make sure nothing in the box is moved and she’ll find out if it does and nothing had been moved so he hasn’t gotten around to opening the box this far which means he doesn’t have the key yet.
I’ll just take her word for it. She’s not a dumb person and knows what she is doing normally.