Samples Depot has been transparent about this. The bundle aggregates releases from their "Vault" series spanning nearly a decade. Consequently, there is some overlap. You will find, for example, a "SuperSaw Lead" in the Trance folder and a slightly different version of the same wave-table in the Progressive folder.
Let’s put 80,000 presets into perspective. The average commercial preset bank contains between 50 and 150 patches. That means the Samples Depot bundle is roughly equivalent to rolled into one. Samples Depot 80-000 xFer Serum Presets Bundle
these presets within Serum's browser to keep your workflow fast? Royalty Free Samples and Loops Producer - Samples Depot Samples Depot has been transparent about this