Western Digital’s SanDisk division today announced it’s shipping its fastest USB flash drive ever — the 256GB SanDisk Extreme PRO USB 3.1 Solid State Flash Drive.

The new drive sports data read speeds of up to 420MBps and write speeds of 380MBps, which are close to internal solid-state drive (SSD) speeds. The company said a user could transfer a full-length, 4K movie to the drive in less than 15 seconds using a USB 3.1 computer port.

With a price tag of $180 ($1.42 per gigabyte), the company is marketing the high-end thumb drive to creative professionals, tech enthusiasts, “or anyone who creates and shares massive files.”

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