USB insane write speeds first few seconds

[Jaakow22]

I noticed that when I plug my 16 GB USB (15MB/s read, 7,5 MB/s write) and when I put a file on the USB it starts copying at 150 MB/s the first 5 seconds. I have USB 2.0. And the file was copied to the USB, the file was not corrupted and I'm sure it is not a glitch. It copied a 760 MB movie for just 5 seconds. And as soon as it copied I unplugged the USB and it was not corrupted. But when I copy large files that the speed slows down to 500 KB/s. The USB Stick is low quality because with a 5 year warranty it died 2 times in 2 years and I got it replaced for free but all my stuff was gone, twice. Any ideas?

 

[whs]

The maximum data rate of USB2 is 60MB/sec. And to achieve that speed, you need a so called 'high speed' USB2 stick. So 760MB in 5 seconds does not compute. It is a minimum of 13 seconds - if you are lucky.