Ok, that's a start. You still need to look at the CWD table if you're using internal users because the keys on it are used to tie data to users.
You'll need to define exactly what you mean by "profile data" though because there's several things you might mean, and data on users is held in many places.
Taking the one item you have named as an example... the file is treated as an attachment, and to find out what profile picture is tied to a user, you get the user's ID, then look in "values" to find out what to look for in "attachments"
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