SanDiskExtreme PRO SD UHS-II USB-C Reader - SDDR-409-G46

Works snd seems faster than built in socket. I have not software to measure data flow.

Excellent memory card reader from SanDisk.No issues at all, read perflectly all memory cards from any brand.Recommended product!

Works great. Its the fastest data transfer cord I own. Videos that used to take me 10-15 minutes to transfer now take 30 seconds max. Super useful for a quick transfer. Also super high quality material. Not cheaply made or cheap feeling at all. Highly recommend after all the research into these things I did. By far the winner.

This reader has worked flawlessly for about three years with my MacBook. I think it is a very good value.

Works as advertised not issues with it.

I received one of these readers and used it several times, but I found that it constantly stopped working.Unplugging the reader and then re-plugging it got it working again, but then it would stop working it again, so I am returning it.This was "used-like new", so I don't know if they are all have this problem, or if I just got unlucky.EDIT: I think that I've found the cause for the problem I was seeing, for Windows 10, at least:It looks like, for this reader, when it is plugged in, it appears as a reader (in the system tray), but is grayed out. Then when you insert an SD card, Windows systray shows the SD card under the reader, but the reader is UN grayed and the card is grayed out, so the only one you can select to eject is the reader, and after you click on eject the reader, Windows doesn't notice the reader again when you insert a card into the reader, UNLESS you unplug the reader from the USB port.I compared this to several other (different brand and model) USB SD readers I have, and they all allow you to eject the SD card in the systray and if I do that, then later I insert an SD card, the card is recognized.I did find a way to eject the card such that the reader still recognized when cards are inserted... Instead of ejecting the reader in the systray, I right clicked the SD card "drive" in Windows explorer, and if I do that, then the reader still recognizes cards when they are inserted.So this reader is behaving differently, and, in my opinion, incorrectly. Other than that it functions correctly, so I changing my rating to 4 star.

I got this for a Mac Mini M4 and a iPad Pro. After figuring it out, my wife copied photos and videos to it much quicker than with a USB-A. It is new so longevity is an unknown.

The SanDisk Extreme PRO SD UHS-II USB-C Reader, model SDDR-409-G46, is an absolute game-changer for transferring data quickly and efficiently. As someone who relies on fast and reliable data transfers, this reader has exceeded all my expectations. Its USB-C connectivity ensures lightning-fast transfer speeds, allowing me to offload large files in a fraction of the time compared to other readers. The UHS-II compatibility means it's optimized for high-speed SD cards, perfect for handling 4K video footage or RAW image files with ease. Plus, its compact and durable design makes it perfect for on-the-go use, whether I'm in the studio or out in the field. Whether I'm a professional photographer, videographer, or simply a tech enthusiast, this reader is a must-have accessory. Five stars all the way for the SanDisk Extreme PRO SD UHS-II USB-C Reader!