Easy Rename is a quality of life imrovement for Blender and is a must have for anyone that works with the high to low poly baking workflow. This addon will help you quickly rename your objects with the _low or _high suffix for baking by name without going into all the trouble of renaming your 40+ meshes manually.
You can later bring these objects into a different baking software such as Substance 3D Painter or Marmoset Toolbag 4 and easily bake by name there too.
To use the add-on just select an object or more (up to an unlimited amount of objects selected) and click the button that adds your desired suffix. (_low or _high).
The add-on has 4 buttons:
Add _low suffix - Adds the _low suffix to selected objects. Add _high suffix - Adds the _high suffix to selected objects. Copy object name to its data - Copies the selected objects names to its corresponding datablock (mesh data). Sort to collections - Creates two collections called Highpoly and Lowpoly, then adds selected _low objects to the lowpoly collection and _high objects to the highpoly collection.