I have updated phantom 3 pro before, just updated craft but remote does not read thumb drive to update?  Any ideas?
Thanks

If you were on a version prior to 1.3.0 then you need to upgrade your Tx to that first then your Phantom.  The current version did not require a Tx update if you were on the current firmware.  If not then it requires an extra step.  Another reason to follow DJI for your upgrades.