One of the primary reasons for the enduring popularity of the 720p format is efficiency. A full 1080p Blu-ray rip of a visually dense movie like Gods of Egypt can easily exceed 2 to 3 gigabytes. A 720p "web-dl" or "bluray rip," however, usually clocks in between 800 megabytes and 1.2 gigabytes. This makes it ideal for users with limited hard drive space or those viewing on devices where storage is at a premium, such as tablets or laptops.