Sandisk Extreme USB 3.0 - not visible in boot menu

USB Flash Drives All USB Flash Drives
2

Any ideas?  

Not sure what you have done to the drive at this point but check out these ideas.

  1. Read this thread starting at this posting.

http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/Sandisk-Extreme-64GB-make-it-a-fixed-drive/m-p/338053#M10330

  1. Try Easy2Boot to make the drive bootable.