The KROTOS SFX & PLUGINS for Sound Design Humble Bundle:
https://www.humblebundle.com/software...

This bundle is a HUGE collection of 60GB+ of sound effects files in WAV format. Additionally it contains a few synth VST as well as a 3 month subscription to KROTOS. Unfortunately the subscription requires a valid credit card to activate. Thankfully the subscription really isn't required nor that important to the rest of the bundle.

Links
https://www.humblebundle.com/software...
https://gamefromscratch.com/krotos-sf...

The above links contain a code that enable you to direct a portion of your purchase to support GFS (and thanks so much if you do!)