The Sims 4 resource.cfg file

This text file is created by default by the game and placed in your Mods folder when you run it.  It tells your game how many folders deep to read your custom content and ordinarily allows for up to 5 nested folders inside your Mods folder.  If this file goes missing, running your game again will normally recreate it.  However, if it isn't recreated for whatever reason, you can either download it from here or recreate it...

Download it

Click the link below and save this to your  Documents\Electronic Arts\The Sims 4\Mods folder: 

Resource.cfg

Note: If you receive a security warning such as this, click  KEEP.  This cfg (configuration) file is a perfectly safe and can only be used by The Sims 4, but as cfg files are used for all sorts of apps, operating systems do treat them cautiously.

Or, create it yourself

If for any reason you're unable to download the file, here's how to create it yourself:

1. Open a text editor such as Notepad and copy the following text into it

   Priority 490

   PackedFile TSRLibrary/tsrarchive*.package

   Priority 500

   PackedFile *.packagePackedFile */*

   .packagePackedFile */*/*

   .packagePackedFile */*/*/*

   .packagePackedFile */*/*/*/*

   .packagePackedFile */*/*/*/*/*.package

2. Choose SAVE AS, not Save

3. Change the Save as type from Text to All files: 

   

4. Enter the File name as resource.cfg
5. Save this to your Documents\Electronic Arts\The Sims 4\Mods folder

Note: custom content installers such as the TSR CC Manager and Vortex will automatically add lines to this file when you use them.  This is normal and can be ignored.