Hi all, So I have a bit of an issue I cant seem to solve. I am going from a MBP Early 2011 to a Windows PC with a TB3 controller and port with Apple TB3 to TB1/2 converter. I had my MBP Early 2011 (first gen thunderbolt, but 10Gbe capable I believe - Netowrk Utility lists it as such, as does my experience) connected to a Win10 PC, and when running Blackmagic Disk Speed test from the MBP and selecting the SSD boot drive of the PC I would see test speeds of around 500MB/s - so clearly it seems 10Gbe speeds. However I was getting super slow access to external drives on the Windows machine - I spent a day trying to solve this and managed to eventually with a combination of changing some settings and changing the drives to 'optimal performance' (enabling cache). However somewhere along the way something else changed, as now when I run BMD disk speed test I only get 120MB/s test speeds - suggesting I am getting an ethernet link speed of only 1Gbe. The only thing I have changed which I cant change back (I think) is that I installed Sierra - but I am unsure if this is what caused the drop in speeds across the network. I am going to at some point get hold of another MBP to see if the problem persists on that machine - or if it persists between two Macs, but for the life of me I cant think what would be limiting the speed. If anyone has any ideas or anything I can check then please do let me know!