I am using WD 4 TB hard disc from 4 months. Its Light slim and durable product. Device comes with 3 year warranty. Its sleek but bit bulky always need to carry with carry pauch. Outer surface is scratch resistance I cant find a single scrach after using for 4 months. Device supports both USB2.0 and USB 3.0 connectivity. FILE Transfer speed is good. I stored upto 3TB of HD videos, Games, Documents all are safe. After 3TB of storage use also Hard disc is not lagging with performance. We can notice little delay in accessing files but its ok compared to its large space.
Usage of device is easy. Just plug it with USB connector to USB connector of Laptop or desktop thats it. Small user manual is available with package. System will load drivers automatically and after 30 seconds device is ready to use. Device heats up a little when used for more than 30 minutes but it cools down in short time. Over all its value for money product.