These are the 5 best libraries I've found for sound effects, whether you're looking for individual sounds or entire libraries. They're completely free, for personal or commercial use.

Cheap Handheld Recorder (DR-05): https://amzn.to/3eHUBvh

- Libraries -
Freesound: https://freesound.org/
Soundbible: https://soundbible.com/
YouTube Audio Library: https://studio.youtube.com/
99Sounds: https://99sounds.org/
Sonniss: https://sonniss.com/gameaudiogdc

- My Gear -
My camera (newer version): https://amzn.to/3iDRTcC
Canon 50mm f1.8: https://amzn.to/2TsOkuV
Sigma 17-50mm f2.8: https://amzn.to/35hBGBY
My microphone: https://amzn.to/3cG5iwW
My headphones: https://amzn.to/3gjy5JH
My portable recorder: https://amzn.to/2TsOz9j
My voiceover mic: https://amzn.to/3vkunnA
My interface: https://amzn.to/2Smi9xn


Disclaimer: I'm not sponsored by any of these companies, but some of the links above are affiliate links. They won't cost you any extra, but I get a small commission if you use them.