The actual recording speed of a movie from an SSD drive to a flash drive, no matter how it is formatted in exFat or NTFS, and no matter what cluster size (tried everything), ranged from 27 to 40 Mb / s (that is, the average actual write speed is ~ 30 Mb / s). As a result, a 5GB film was recorded in just over 2 minutes. Still a good result in my opinion.
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