Use the ‘format’ feature in Windows to
format Your camera’s storage media
Choosing a fast USB-C flash disk
USB-C flash disks are designed to offer fast, affordable storage for a wide range of devices and
are readily available from a variety of consumer electronics outlets. It’s important to note that
film making is only one part of the USB-C flash disk market, so choosing the best drive is vital to
making sure you have enough speed to record Ultra HD footage.
For the most up to date list of recommended USB-C flash disks please go to
www.blackmagicdesign.com/support.
Important Notes About USB-C flash disk Speed
Some models of USB-C flash disk can’t save video data at the speed the manufacturer
claims. This is due to the disk using hidden data compression to attain higher write
speeds. This data compression can only save data at the manufacturer’s claimed speed
when storing data such as blank data or simple files. Video data includes video noise
and pixels which are more random so compression will not help, therefore revealing the
true speed of the disk.
Some USB-C flash disks can have as much as 50% less write speed than the
manufacturer’s claimed speed. So even though the disk specifications claim a USB-C
flash disk has speeds fast enough to handle video, in reality the disk isn’t fast enough
for real time video capture.
Use Blackmagic Disk Speed Test to accurately measure whether your USB-C flash
disk will be able to handle high data rate video capture and playback. Blackmagic Disk
Speed Test uses data to simulate the storage of video so you get results similar to what
you’ll see when capturing video to a disk. During Blackmagic testing, we have found
newer, larger models of USB-C flash disk and larger capacity USB-C flash disks are
generally faster.
Blackmagic Disk Speed Test is available from the Mac app store. Windows and Mac
versions are also included in Blackmagic Desktop Video, which you can download
from the ‘capture and playback’ section of the Blackmagic Design support center at
www.blackmagicdesign.com/support.
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