symbolic links to "Storage Expansion" in Linux Mint?

[knottedknickers]

I was just given an Acer Aspire One ZG5 (AOA 110-1588). Kind of a cool little thing. It has an 8 GB SSD and a "Storage Expansion" slot. I stuck a 32 GB SD card in there, but now I'm wondering about making 'symbolic links' so that if I save something in /home/user/Documents, for example, it will actually be saved to the "Storage Expansion" card (which mounts at /home/media/SD_HOME).

Or is there a better way to get Linux to save everything to the "Storage Expansion" SD card rather than manually selecting it every time?

Thanks for any help!