I'm backing up my Microserver running WSE 2016 to an external USB 3 HDD. Around 6 TB of data. And it takes days. Task Manager indicates plenty of RAM (I have 16 GB) and that the CPU is at 5%. USB 3.0 has plenty of bandwidth. So why is it taking so long? The only extra software I have in Malwarebytes but eliminating that makes no difference. The HDDs are in RAID 1.