First to make instructions a bit clearer: while in dropbox select the arrow by the pic. Select export ( box with arrow coming out of it) , select save to sd card, select export.
Now scroll down the directory and select pictures folder. Select export. Exit out of dropbox. Enter your gallery. View as albums: upper left-hand corner there is a down arrow, select albums from list. Gallery usually defaults to this. You should see all your pics you have placed in a group labeled pictures. And yes, I do like concise and well explained directions even if I am not a newbie.