Sort of. Pro Camera Classic can't capture directly to an external storage device due to limitations with the hardware.
Although you can't record directly to the storage device you can transfer videos that have already been captured.
Follow the steps below to configure an external drive
Within Pro Camera Classic go to Settings -->FILES
- - Select the files you want to transfer
- - Tap the share
icon
- - You should see a list of different apps
- - Scroll all the way right and tap MORE
- - Select your drive and give it access
- - You should then see it on the share list and you should be able to transfer files to it