I have a 3TB Western Digital USB Drive (details below) it was almost full.
If you are planning to quickly transfer data off a USB Drive to your Synology you had better budget upwards of 4 days to make the transfer.
The transfer speeds are so slow….
I searched the forums and played with different tweaks but in the end the advertised speed rates on this drive (using Mac, Linux and Windows) are no where near what the claims on the bUSB interface says it can deliver.
Combined with the extra slow down of the ntfs being read by a non-Microsoft created ntfs driver and you have incredibly slow transfer speeds.
So apparently you can get better transfer performance by formatting the drive using ext4, it will be interesting if the transfer rate becomes useable with that change.
Ext HDD 1021:
Product ID: 0x1021
Vendor ID: 0x1058 (Western Digital Technologies, Inc.)
Serial Number: 574341575A30353934343631
Speed: Up to 480 Mb/sec
Manufacturer: Western Digital
Location ID: 0x14500000 / 8
Current Available (mA): 500
Current Required (mA): 2
Capacity: 3 TB (3,000,590,401,536 bytes)
Removable Media: Yes
Detachable Drive: Yes
BSD Name: disk2
Partition Map Type: MBR (Master Boot Record)
S.M.A.R.T. status: Not Supported
Capacity: 3 TB (3,000,589,352,960 bytes)
Available: 25.44 GB (25,444,646,912 bytes)
File System: NTFS
BSD Name: disk2s1
Mount Point: /Volumes/3TUSB
Volume UUID: 21DBF152-3943-44D3-B85D-BDA230768A74