This happens now and then, and it's known as the XY Problem.
This user is asking for a solution which will not solve his initial problem. Instead, he could have asked "How do I by-pass the download limit?".
As long as you point out that the solution the OP is looking for will not solve OP's real problem, and offer an alternative solution instead, then it should be fine.
- Alternative instead of real answer
- If I solve someones problem instead of answering their question, should I post a comment instead?
Is there a risk for your answer being flagged as "not an answer"? According this answer, (from the discussion "When should the “Not an Answer” flag be used?", no:
A bad or a wrong answer is still technically an answer. Moderators aren't here to judge the correctness of answers. That's what the voting system is for, so the right way to handle those is to downvote, edit, or leave a comment.