Blu-ray and DVD are both optical disc storage media formats. They have many similarities, but there are also some key differences.

The main difference between Blu-ray and DVD is that Blu-ray discs can store much more data. A single-layer Blu-ray disc can store up to 25 gigabytes (GB) of data, while a dual-layer disc can store up to 50 GB. A DVD, in comparison, can store only 4.7 GB of data.

This extra storage capacity is what allows Blu-ray discs to support high-definition video resolution. A Blu-ray disc can store up to 1080p resolution, while a DVD can store only …