Error Failed

Hi, My expand has started saying:

“Error Failed to connect to expand Drive. Please remove and reattach”

when plugged into any ios device-any ideas?

You can try refreshing the FW with the PC FW upgrade tool linked below. If that does not work it may be a bad drive so I would suggest contacting sandisl support and submit a warranty claim. 

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