We tossed all of my stepsons stuff well after he got out of high school but it came back to bite us in the ass. When he got into trouble and we were looking for services for him as an adult we couldn't provide anybody with any documentation of his diagnosis or the neuro psych eval he had done. And since it was over 10 years old none of the doctors had retained those records. It probably wouldn't have mattered bu still. And DH has a horrible memory and I wasn't in the picture back then.