User 1 has a soft quota limit of 5GB, meaning they can exceed the quota but will receive a daily notification email when they do. Therefore, User 1 can continue to add another 5GB file but will be notified. User 2, as part of the AAPM group, has a hard quota limit of 10GB, which strictly prevents any further data additions after the quota is reached. User 2 cannot add an 8GB file without restriction because the hard limit enforces the quota strictly without exception.