Beyond Light will require you to download Destiny 2 again
When Beyond Light is released, you will need to re-download Destiny 2, according to Bungie.
This is because with Destiny 2: Beyond Light, Bungie has revamped its content building and patching pipeline for "speed and install size."
It also means that Destiny 2's install size will shrink by 30-40% due to a "combination of culling unused or replaced content," install size optimizations, and moving some content to the Destiny Content Vault. You can expect the install size to shrink between 59GB and 71GB depending on the platform.
Bungie states that these improvements should also help control install sizes better in the coming years.
Due to all these changes, Beyond Light will be a full re-download on all platforms and for those with slower or metered internet connections, don't worry: preloads will open on November 9 giving everyone around 10 hours to download before Beyond Light hits.
Originally slated to drop on September 22, Beyond Light arrives on November 10.