Moving to the U.S.: what records should I gather now?

I may move from France to the U.S. next year. I have old account papers in three places. What should I gather while I'm still here?

I'd start with a list of each account and who holds it. Then collect statements and papers that show when you bought things and what you paid.

Some of those papers are old. Is a list enough for now?

It's a good start. Mark what's missing, and ask the bank for copies. Show the full list to a cross-border tax adviser before you make account changes.

I'll make one folder and a short missing-papers list. Much less scary.