Just updated my 2021 ST. Took 15 mins to download map update, 30 mins to unzip to a WD My passport drive, and about 2.5 hrs to install in vehicle. Sync 3.4.22200 and maps version NA 2 21.
I heard the vehicle making it's transformer noises, jumped back in, powered up, and it said update successfull. Easy enough.
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