The files you create in your home directory reside on one of the disks of our main file server. The amount of disk space you can use is subjected to some restrictions.
Every user has a maximum disk quota.
Hog will tell you your quota, your current disk usage, whether you are over or under quota, and many other wonderful things. Your disk usage is checked periodically by an automatic process which can send you results via email. If you exceed the quota, you will receive a very nasty letter. There are several options for removable storage of files and of course there are programs which you may use to further optimize your usage . As always there are tradeoffs between speed, capacity and reliability.