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If anyone learns that you are mentally from the future, you immediately have an aneurysm and die. You somehow just know this and therefore must keep your true identity secret.
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You wake up as a random 10-year-old specifically in 2002, not your 10-year-old self, and not the age you actually were in 2002.
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You live in the same country, speak the same language(s), and are the same ethnicity as your old self. Your biological sex matches your gender identity (flip a coin if you are enby).
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You have 2 parents and 1.5 siblings. Your family earns exactly the median income for your country.
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The person whose identity you now inhabit left a diary. You have no other knowledge of your new identity beyond this.
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If you try to look for your old family, you learn they had a different child in this timeline who is the same age as you but is not you. They will not believe any attempt to convince them you are related.
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The USB drive is compatible with any standard USB Type A connector. It is just large enough to fit all of Wikipedia, including hosted media and files, and the drive is read-only. The drive cannot be reformatted.
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Stock market trends remain generally consistent for 5 years. After that, assume the butterfly effect will start to skew the results, so you cannot predict what will happen after 2007. Sports become too unreliable to bet on with 100% accuracy after 1 year.
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I feel like I shouldn't need to clarify this one, but no grooming kids. Assume there is a magical force that prevents you from dating anyone until both you and they are at least 18, and no one is attracted to you unless they would also feel okay dating someone who is your mental age.
Likely not, only because drug usage is far too ingrained in the west and most western countries do not have the authoritarian bend to follow up on long-term zero-tolerance enforcement.