If I'm honest I'd suggest not giving her the password but setting it up on her device for her..... because if she has the email address and password she is technically an account owner. I'm sure she wouldnt do anything intentionally, but, if she was to say delete the account then it would be gone and you'd have no comeback - by having the password she is able to do that.
@coachzoelewis wrote:If I upgrade to a business account would that solve the problem?
It would solve the problem because Business accounts share the quota with all members, but it would be unnecessary. A Business account requires a minimum number of users (3) and is more expensive. For what you're doing, it's overkill. The better (and less expensive) option would be to just upgrade your daughter's account as well.
The only way she will benefit from your space is if she is actually logging in and using your own account Your Pro membership doesnt benefit her at all I'm afraid.
What are you trying to do? Do you literally just want her to be able to upload stuff to you?
If so look at Requests: www.dropbox.com/requests
If its to get stuff from you have a look at Shared Links: www.dropbox.com/links