yeah I used to be able to get to my mods by doing that but now my 'The Sims 4' folder is completely different to that it looks like this
_Installer Date Delta EP01 EP02 EP03 EP04 FP01 Game GP01 GP02 GP03 GP05 SP01 SP02 SP03 SP04 SP05 SP06 SP07 SP08 SP09 SP13 SP14 Support
I have never seen this before and I have looked in each folder and there are still mods
That is your installation folder located in the programs folder on your C drive that you have shown. That's the wrong location of the mods folder. What you are looking at is the installation folder of the game. And since you said your game is is an external hard drive, that's the content of the folder that you are showing.
To get the mods folder, do not look at that folder that you showed the content. The mods folder is located in user/documents/electronics Arts/The Sims 4/Mods. Navigate there and you will find the Mods folder.
To make sure you are looking at the right folder you can get a clue from your Sims4Studio. See image below
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