The ones you’re looking for are in your user Library’s Home folder, which is the one you got to name when you bought the computer.
Note: Leave your System Fonts wherever they currently reside those will be in your System folder. On a Mac you can do that by clicking in the search bar of any Finder window, and type in “.ttf” or “.otf” to search for those specific font file types.
otf extension and that should grab the majority of them all in one place. No? That’s okay! Do a search for all files with the. Hopefully, you have all of your font files in the same area of your computer. It’ll take some time to get this system started, but if you do this now it will save you so much of it later on as you continue to collect them. If you have 1000-5000+ fonts and you’re scrolling through them constantly searching for certain styles or that one you JUST CAN’T REMEMBER the name of… then you need my help! Designers end up having sooooo many fonts.