The most visible change for the majority of campus will be the drive letters that are mapped.
Currently, the H drive is your Home or personal space. The H drive will be replaced the S drive. Think "single" or "solo" for your own personal space.
Currently, the G drive is the Campus space. This is a shared area for departments, teams, colleges, etc. The G drive will be replaced with the T drive. Think of this as the "team" space for shared campus directories.