
esm is “\Steam\steamapps\common\Skyrim\Data” so if you’ve removed it from there and put it anywhere else your game won’t work. esm, and is required to run all mods for The Elder Scrolls V: Skyrim. For example, Skyrim ESM file is labeled Skyrim. It has been in use since The Elder Scrolls III: Morrowind, and is used in conjunction with the ESP and BSA file formats.

The ESM file format stands for Elder Scrolls Master file.

