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<blockquote data-quote="RicardoAlves" data-source="post: 326775" data-attributes="member: 27422">Thank you all for the replys and feedback!After&nbsp; a couple of more testing and USB 3.0 updates in my computer (both&nbsp; NEC/Renesas and card reader), I can get now around 30-40 MB/s&nbsp; transferring the files of the D4s. Maybe there was something running on&nbsp; my computer when I got the 15MB/s speed rates!?Still, there are some odd things I can't quite understand:1- I don't see much difference in terms of speed copying files to my computer from a 30MB/s card (Sandisk Ultra) compared to a 160 MB/s card (Sandisk Extreme Pro UDMA7);2- I don't see much difference in terms of speed copying the files to my computer from the same card (160&nbsp; MB/s Sandisk Extreme Pro UDMA7) to different hard drives in my computer&nbsp; (WD 320GB SataII, WD 500GB SataIII and a Samsung SSD 250GB 840 EVO&nbsp; SataIII);3- If I run a test using <a href="http://usbflashspeed.com/" target="_blank">UsbFlashSpeed.com: We know everything about USB Flash speed!</a> to my cards and hard drives the write/read speeds are much higher.So what's the weak link in the chain?</blockquote>

[QUOTE="RicardoAlves, post: 326775, member: 27422"] Thank you all for the replys and feedback! After a couple of more testing and USB 3.0 updates in my computer (both NEC/Renesas and card reader), I can get now around 30-40 MB/s transferring the files of the D4s. Maybe there was something running on my computer when I got the 15MB/s speed rates!? Still, there are some odd things I can't quite understand: 1- I don't see much difference in terms of speed copying files to my computer from a 30MB/s card (Sandisk Ultra) compared to a 160 MB/s card (Sandisk Extreme Pro UDMA7); 2- I don't see much difference in terms of speed copying the files to my computer from the same card (160 MB/s Sandisk Extreme Pro UDMA7) to different hard drives in my computer (WD 320GB SataII, WD 500GB SataIII and a Samsung SSD 250GB 840 EVO SataIII); 3- If I run a test using [url=http://usbflashspeed.com/]UsbFlashSpeed.com: We know everything about USB Flash speed![/url] to my cards and hard drives the write/read speeds are much higher. So what's the weak link in the chain? [/QUOTE]

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