Sandisk hangs my Mac (?)

To Mac users out there – have you ever had third-party USB devices causing your whole system to hang?
I seem to be having lots of problem with my Sandisk 6-in-1 reader. I found similar problems posted in this discussion group. I can select a few files in my SD card (using Finder), and then suddenly Finder quits totally. The icons on my Desktop disappear, and appear again (like being refreshed). Then I try to do the same thing again, select the same files, and everything disappears once more.
It’s really bizarre and I’m tired of rebooting my system continuously. Any solutions?