I like their ssd/usb drives, but this failed on 3rd use/mount.
it would not read any of the 6 or so microsd I had on hand.
at first I thought it was my computer port, tried several. then thought it was the computer/os, tried several in the house.
brought out an older 5-in1 it worked fine in all locations and microsd.
I can not recommend this reader and have bought another about the same size. Since I experienced this unexpected failure from this sandisk product, I've been using the following to test this new reader/adapter/microsd I've been putting it through some constant read/writes for the last hour and this off brand has been working great. btw the test I'm using is: sudo e2fsck -cc -C 0 /dev/sdd1 via usb 3.0 port on my desktop.