Open Lightroom and choose this in the menu: Mac - Lightroom> Settings PC - Edit> Settings WINDOWS.
This tab will show where our Presets were saved by default.
Download your purchased Lightroom Presets which will come in a. This instruction will guide you through the Presets installation process for Lightroom CC.
If you install new profiles or presets or update presets in Lightroom Classic, and want them to sync with Lightroom Mobile - and you’ve previously launched Lightroom, you will need to import the new/updated presets and profiles manually.
Note: while you could delete Lightroom once you migrate your presets, if you plan to continue to create, update, and/or install presets using Lightroom Classic and want to sync them with Lightroom Mobile, I would suggest leaving Lightroom installed and then follow the instructions below for migrating updated presets.