I have been using BitLocker with a 4GB SanDisk U3 drive for several weeks now. I picked up a PNY 4GB atache drive for a backup. I have made a duplicate key on the PNY through the management GUI as well as tried to copy the key off the U3. In both cases I can see the BEK file on the PNY but when I attempt to authenticate with it bitlocker asks me to "insert key storage media" If I use the U3 my system will boot but it doesn't seem to like the PNY any ideas?