AlansDronePics
First Officer
Flight distance : 823163 ft
Guernsey
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Nothing said below is intended to detract from the informative OP. I am delighted this has worked for you.
Many users may not realise that between the external drive and the computer bus (ultimately where the signal (data) is processed are bottlenecks in the circuitry. In addition, when other processes are running in the background that the user probably won't be aware of, this will drastically slow down the transfer of data.
I would expect your computer to be a modern, fast piece of kit, and you obviously know what you are doing. Many users new to video through drones may not be so lucky, because they don't have the best kit.
If the user has a Win 10 system, they may know that they can test data throughput by transferring a large video file to an external device and back again (most likely with quite different results. This will indicate possible issues with their computer. Not all USB ports are high speed, some devices have a fast port for drives and slow ones for things like printer, scanners etc.
Note the current speed line, which varies in height with the speed numbers and the green graph which shows speed fluctuations. Typically, there is a burst to start then it slows to a steadier rate.
If you try this with your SD card, you may be surprised how poor the result is compared with the rated card speed. The fact the SD card works perfectly in the drone or camera is because it is directly connected to the bus of the drone or camera and not running through a usb port.
To copy the file from desktop to a folder on the internal hard drive is 1.26Gigabyte/sec so, as you see, USB ports are great for connectivity, but not the fastest way to work.
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