Flash-based storage devices such as SSDs have no mechanical components. Due to this they are typically faster, run silently, and are more shock resistant than traditional HDDs.
Apple MacBook Air (2015) 13" Intel Core i7 2.2GHZ / 8GB / 512GB
More USB 3.0 ports allow you to connect more devices to your computer that support USB 3.0. USB 3.0 is an improved version of USB 2.0 which offers faster transfer rates.
The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.
Apple MacBook Air (2015) 13" Intel Core i7 2.2GHZ / 8GB / 512GB
The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.
Apple MacBook Air (2015) 13" Intel Core i7 2.2GHZ / 8GB / 512GB
RJ-45 ports are used for LAN (Local Area Network) connections. With more ports you can achieve increased bandwidth across a LAN, or connect to multiple networks. It also has the added benefit of not losing connection to the network if one fails.