These files are used in AI art generation software, such as the AUTOMATIC1111 Stable Diffusion WebUI .

Placing a .ckpt file · AUTOMATIC1111 stable-diffusion-webui - GitHub

If you are looking for the original article or download for this specific, custom model (as "MyAstaber1" seems to be a personal username or unique model identifier), it likely originated from a repository such as Civitai or a similar Stable Diffusion community model hub.

Ensure the source is trustworthy before loading the .ckpt file into any AI system due to potential security risks.

files are older formats that store AI model weights and can potentially contain malicious code.

If you are just starting to use this file, I can help you with: How to How to install it in A1111/ComfyUI

It is generally recommended to convert files to the safer .safetensors format.