ixpand - not detected after ios 9.3 update

I started again with this on. Different computer.  Error messages kept flashing up throughtout the update, and messages stating that the drive was not working properly.  Then suddenly a message to say that the update was done, plugged it back into my ipad,  ran the update on there which took a matter of seconds and hey presto, all working now.  I can only think that the failed ipad update the first time messed it up.