SanDisk Extreme 3.0 64GB only works in 2.0

USB Flash Drives All other USB Flash Drives
3

See if this thread helps.

http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/SanDisk-Extreme-not-working-in-USB3/m-p/314231

Cacho’s posting may help.