Hi laly! In the past, when there were no tutorials to teach us how to reduce the size of images and documents, some members did indeed upload the key in another document when it was too heavy. At the present time, there is no need to do that. keys should be uploaded together with the exercises in the same document. If the document is too heavy, we must  reduce it. Please, do not stress because of this. And by the way, anyone can report a worksheet. You don �t need to be a moderator to do that. But don �t forget to look at the dates. You shopuld forget all worksheets uploaded before the new rules (February 18), unless they are copies, of course.