[PedOncoDoc]

You should be able to fill in most of the crucial information: Name, date of birth. Medical conditions, year (approximately) thos conditions were diagnosed, and surgery with date of surgery (and indication if you have it.) Hospitalizations - date (Approximate), length of stay and reason for stay. Any major complications from surgery or during hospitalization are a plus. Medications and current doses - good to keep in a spreadsheet anyway, IMHO. Allergies - medication and otherwise. Vaccination history and date of last booster for Tetanus/diptheria/pertussis. It should be easy enough to grab a set of vitals, weight and height on yourself.

For the kids you might want to include any particular complications with pregnancy or in the newborn period as well as the above - this becomes less important in aftert puberty. The vitals are less crucial, but growth and weight percentiles are always helpful, as well as the most recent weight (for dosing meds).

A one-time record request may be needed to fill in some of the above baseline information if you've not taken a very active role in your health care. Alternatively, some health systems have a public access version of their electronic charting where you can access your labs and medical history. Afterwards you should be able to keep everything up to date. The vitals are still typically pen to paper and then put in the computer system - you can copy those down at any and all visits. Most doctors offices I've worked in are happy to mail you a copy of their visit notes if you request it. This is different than a record request and typically is provided free of charge.

The baseline lab values are only useful if you have some chronic conditions which lead to abnormal values.

That's my $0.02 on the matter. The only other thing to consider is where you will keep the USB drive to ensure it is secure but is accessible when you need it. What was your intended use for these records?