I have the same problem. Dolphin File Browser is inadequate to my task.
# lsusb
Bus 002 Device 002: ID 08e4:017a Pioneer Corp. Pioneer external drive
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001...
