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--- macos [2025/12/10 01:31] – Name
+++ macos [2025/12/11 00:54] (current) – [Create Symbolic Links] Name
@@ Line 34: / Line 34: @@
 }' > $HOME/Library/KeyBindings/DefaultKeyBinding.dict</code>
     - No need to reboot
+====Create Symbolic Links====
+Creating a symbolic links (sym link) makes the operating system, or application, think that the file or folder is in a location is it not.\\
+In this example, I am creating sym link to store my email (Thunderbird) files on an external drive. This frees up internal disk space.
+  - Backup directory or file to a safe location.
+  - Copy the directory or file to an external drive.
+  - Double-check the backup is correct.
+  - Triple-check the backup is correct, because the next step cannot be undone.
+  - Delete the original file or directory.
+  - Empty the Recycle Bin.
+  - The following example is the exact code I used.
+    * <code>sudo ln -s /Volumes/4k-ext/tim/Library/Thunderbird/Profiles/bblzz0wg.default-release/ /Users/tim/Library/Thunderbird/Profiles/</code>
+      * /Volumes/4k-ext is the external drive.
+      * /Users/tim/Library is the internal drive.
+  - Test.
+  - Done.
+I have successfully done this for Documents, Pictures, Downloads, Music, and many others. For the folders in my /usr/tim directly, I had to create sub-folders. For example, /usr/tim/Documents is now /usr/tim/Documents/Documents. Where, the latter is a sym link that points to the external drive. I chose not to modify anything in my profile hierachy in case my external drive is not available. I also backup my external drive to a NAS. Finally, my external drive is a 2TB NVMe drive connected to a 10 GB/s USB-C port.

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