The total disk space is your quota, when your disk space begins to get near the quota you should either remove unneeded files or contact us to upgrade (see below).
If your need more disk space, contact us (from the home page) well in advance. You can add 100 MB for $5 per month or blocks of 250 MB for $10 per month. You can add up to a gigabyte (1000 MB) of total storage space.
Tip: a great way to cut back on disk space is to set your email software to remove messages from the server after you receive (download) them to your computer, this is usually in the advanced settings under tools - accounts. Another great way is to disable your Default Forwarding Address if possible.