Created Change model locations i.e. external disk, shared location etc. (markdown)

Change-model-locations-i.e.-external-disk,-shared-location-etc..md

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+Sometimes it might be useful to move your models to another location. Reasons for this could be:
+- Main disk has low disk space
+- You are using models in multiple tools and don't want to store them twice
+
+The default model folder is `stable-diffusion-webui/models`
+
+## macOS Finder
+- Open in Finder two windows e.g. `stable-diffusion-webui/models/Stable-diffusion` and the folder where your models are located.
+- Press <kbd>option ⌥</kbd> + <kbd>command ⌘</kbd> while dragging your model from the model folder to the target folder
+- This will make an alias instead of moving the models
+
+## Command line
+- Let's assume your model `openjourney-v4.ckpt` is stored in `~/ai/models/`
+- Now we make a symbolic link (i.e. alias) to this model
+- Open your terminal and navigate to your Stable Diffusion model folder e.g. `cd ~/stable-diffusion-webui/models/Stable-diffusion`
+- Make a symbolic link to your model with `ln -sf  ~/ai/models/openjourney-v4.ckpt`