The built in Ethernet adapter on my almost 10-year old Lenovo ThinkPad W700 get fried by lightning a couple years ago. Fortunately, the Wi-Fi adapter was not damaged, so I still had Internet and network connectivity, but at Wi-Fi speeds. That was not at problem until the W700 was replaced about 18 months ago by a Lenovo ThinkPad P71 and the Lenovo W700 was moved upstairs. Our house has a metal roof and the Wi-Fi throughput is significantly degraded in that area of our house.Not a big problem for Internet usage but moving large files, doing backups, or syncing files between the two-system using our LAN became painfully slow. So much so that I started using the old 'sneaker net' approach and began moving files and data back and forth with thumb drives. My W700 is from the days before USB 3.0 and only has native USB 2.0 ports. USB 2.0 thumb drives is certainly faster than weak Wi-Fi but still relatively slow, and always cumbersome.The first thing I did was obtain a StarTech USB 3.0 ExpressCard. The USB 3.0 ExpressCard has worked perfectly. Having one USB 3.0 port means I can use USB 3.0 Thumb drives. USB 3.0 connectivity at both ends of the LAN made moving larger amounts of data faster but I still had the hassle of physically carrying thumb drives back and forth, and up and down stairs, between the two Lenovo systems. I tried a USB 2.0 ethernet adapter, but speeds were about the same as Wi-Fi.Then I tried the StarTech USB 3.0 Ethernet adapter plugged into the StarTech USB 3.0 ExpressCard. I had no idea if this would work and crossed my fingers as I rebooted Windows 10. And work it did, and very well I might add. Now I can once again move large blocks of data such as 200 or 300 15mb-18mb photo files between my two Lenovo laptops in a minute or less. And one of my backup strategies of syncing files between the two systems is now much quicker.