You can migrate presets from earlier versions of Photoshop into newer versions. The Migrate Presets command lets you automatically migrate brushes, swatches, gradients, patterns, and more.
The Preset Manager lets you save or load your presets for contours and tools. Each set of presets has its own file extension and default folder. Optional preset files are available inside the Presets folder in the Photoshop application folder.
To open the Preset Manager, choose Edit > Presets > Preset Manager. Choose a specific Preset Type from the Preset Type menu.
To delete a preset in the Preset Manager, select the preset and click Delete. Use the Reset command to restore the default presets.
You can adjust the way presets are displayed by clicking the Preset Manager's gear icon and choosing from the display modes listed:
The default locations for saving/loading/replacing presets are hidden by default in Windows.
See Show hidden files and folders to learn how to view hidden items.