Hi thedeske. Could you expand on your comment above? How does one set this up?
This is old knowledge, so it will bore many. Sorry.
Obviously, if your SSD is not large enough to hold your USER folder, you'll have to have it on a clone or have it thinned out enough for the SSD. Let's assume you have your system set up on the SSD just like the old HD. Let's also assume there is no system on the HD.
Before you go here, remember you will have 2 drives to back up instead of 1. My system SSD uses 30gb. If you want some files on the SSD for speed, no problem after the fact, but first things first.
1. Click on ‘Macintosh HD’ in the Finder and open the ‘Users’ folder. In here you will find a folder named after your shortname. This is your home folder. As it is currently your active home folder it will have a ‘house’ icon assigned to it. Copy this folder to the 2nd hardrive by simply dragging it. (The copied folder will not have the ‘house’ icon as it is not yet recognized as your active home folder. We will change this in the following steps.)
2. Open the ‘System Preferences’ application from either the Dock, the Applications folder or from the Apple menu.
3. Click on the ‘Users’ icon in the ‘System’ section.
4. After entering your password to unlock the padlock, CTL-Click (or right click) on the active admin account (from the list of user accounts in the left pane) to reveal an ‘Advanced Options’ contextual menu. Select this item.
5. You will be presented with a pane full of advanced settings (and also a warning about how you should only change these settings if you know what you are doing!). Ignore all of these settings/fields except for the ‘Home Directory’ option. This is the path that OS X uses to locate your home folder when you login. It should say: /Users/shortname
6. Click on the ‘Choose’ button, and browse to the home folder in the new location (this will be the folder you moved in Step 1 which will be named after your shortname). After you select the new location, the ‘Home directory’ path should change to something like: /Volumes/shortname.
7. OS X will continue to use the original home folder until you restart. So restart the computer and login as normal. To confirm that the new home folder is now active, browse to the folder you copied to the 2nd hardrive and check it has the ‘house’ icon assigned to it. Now that your home folder is successfully located on your 2nd drive, you can delete the original home folder in the Users folder. It should now have a generic folder icon as it is no longer the active home folder.
If you thinned your home folder to get the job done, copy things back into place (pictures, music, film, etc) on the HD.
What you choose to have on the SSD is now under your control.