iXpand 128gb "Error failed to connect to iXpand drive. please remove and reattach."

if you have FW version 2.60.103.0  you have an iXpand UBS 3.0. you are a few FW version behind. the current is 2.60.103.80. try using the update tool linked below for the iXpand USB 3.0. If it still fails to connect it may need to be replaced. 

http://kb.sandisk.com/app/answers/detail/a_id/19654/