Issue kinda grew from this thread.
http://forums.crackberry.com/blackbe...90/index2.html
I just replaced my Sandisk 32Gb ultra with 64Gb extreme plus (both exFAT I believe). Getting the "the handle is invalid." when I click on the Y mapped drive for the SD card. When I switch to mass storage it works fine. I am running Win 7 with most recent versions of link and BB10 and rebooted both devices.