Top positive review
6 people found this helpful
Quality, performance, and versatility. Add a 90 MB/s SD card to max out most HDD transfer speeds.
on March 7, 2017
Here are some numbers.
SD card speeds
SD cards, Class 10 - 10 MB/s (Class number = MB/s)
SD cards, UHS-3 - 30 MB/s (UHS number = 10 MB/s)
SD cards, V90 - 90 MB/s (Video number = MB/s)
Note: SD card technology has evolved faster than the specs sometimes. So you may find an SD card that is labeled UHS-3 that works at 90 MB/s. The V90 classification just wasn't out yet. Check out some benchmarking sites if interested. Pay more attention to the MB/s than the classification when shopping.
USB speeds (there are sites stating higher MB/s numbers but they're not factoring in protocol overhead)
USB 2.0 - Roughly 48 MB/s
USB 3.0 - Roughly 500 MB/s (the higher speeds necessitate shorter, stiffer cables)
7200 RPM - Roughly 80 MB/s for mass data transfer
SSD - possibly 1.8 GB/s (SSDs have multiple protocols and connections available, look up benchmarks if shopping)
Camera - Canon Rebel T3i
Read/Write to card by camera - up to 45 MB/s (if SD card is fast enough)
Read/Write between card and computer via USB 2.0 - up to 48 MB/s (but it feels slower)
RAW CR2 files - about 20 MB each
We're starting to shoot in RAW more. More pictures more often. And when you connect the camera to a computer and browse the chip, the directory listing takes a while to appear, and it appears in chunks. We wanted something faster. So I got a 90 MB/s SD card and this USB 3.0 card reader. Shooting goes as fast as the camera is capable, then we take the chip out of the camera and put it in this card reader connected to our computer through a USB 3.0 port (the ones with the blue-tip connectors.) Directory listings come up much faster and transfers happen at 80 MB/s (capped by HDD transfer speed.)
I had considered getting an internal SD card reader for our computer, but I am very happy with this one. The case feels solid so I feel comfortable packing it for travel when needed. It comes with a USB-C adapter so I can use it with my phone.
This device is a big win because of quality, performance, and versatility.