@Nk9bjP4A i'm not sure if this is correct, but i think when they're talking about a vacuum cleaner, they mean the fact that she sucked up all the magic stones to lessen the time it takes to collect them, also, since there is no such thing as a vacuum cleaner that could take all of the same item in the room and only take those items, they just chose a vacuum cleaner because it's currently the closest thing to it.
also, the bag she's using isn't a storage bag, it's a normal bag, about the size of a garbage bag i think, she just took it so she could use it to simulate the bag a vacuum cleaner uses.
i hope this makes sense, as i'm not sure if it will make sense, as i'm currently sleep-deprived.