We have a new Macbook Pro 15" running on Mojave 10.14.1 when we try to transfer 37GB of UDF formatted footage using a SBAC-US30 over USB 3 it takes over an hour. If we try and transfer similar file size FAT formatted, it takes a couple of minutes using the same SxS reader into the same port etc.
On our other computers (laptops and Mac Pro running Mojave, both UDF formatted and FAT formatted take a few minutes)
We have tried to instal 2.40 UDF driver but makes no difference. Any knowledge appreciated.