Moving money that you own, from one account to another that you own, is not reportable.
However, if you are a US person and you own a foreign account worth more than $10,000 at any time during the year, you must file an FBAR report. If you own a foreign account with a balance above a certain limit on the last day of the year, you must file form 8938 as well.
https://www.irs.gov/businesses/comparison-of-form-8938-and-fbar-requirements
Form 3520 is used by US persons to report gifts from non-US persons. It would never be used for money transfers from yourself to yourself. If you are not a US person, you are not required to file this form (but you may have other gift tax requirements in your home country).
The exclusion for gifts by a US person to a non-resident alien spouse was increased to $175,000.
https://www.irs.gov/instructions/i709
