Assume that the future can change based on your actions, so any historical information that you bring along with you from the intervening 25 years may quickly drift out of the new realities history.
Edit: also assume that you can be given a healthy 21-year-old body if you want or take your previous self’s place.
Further, identification will be provided for you if you were not born at that time.
Don’t forget a charger, otherwise you’ll be screwed for awhile
USB 1.1 was already around in 1999, USB 2.0 being released in 2001 with Mini-A/AB/B being available in 2001, and the standard Type-A as early as 1996.
Take one of those USB Type-A to USB-C and you’re good enough until circa-2008 when USB-C starts to get around
USB-C wasn’t designed until 2014. So yeah you’ll need a charging cable regardless