If you need to move the assets that Portfolio manages, you can accomplish that in one of two ways.
The first is to simply swap out the drive with a larger one, as long as the same file path is maintained, Portfolio won’t know the difference.
If that option isn’t feasible, move the top most directory containing your assets to a new drive. (This maintains as much of the old file path as possible).
Once that is done, give us a call and we will help you install and run a script for the Portfolio desktop client, this will update the paths in your Portfolio database.