The $PROJECTS file system provides a shared space for research groups to collaborate, store data, and install group-specific software. Every faculty member has a default group and all users under that faculty member's sponsorship will belong to that group. Additionally, faculty members might have more than one group depending on their needs.
You will only be able to write data into directories corresponding to your group membership. In order to determine which group(s) you belong to, use the id command:
Once you have determined your group membership, you will be able to find the corresponding projects directory at $PROJECTS/groupname (where groupname matches your group name). You can create directories in $PROJECTS/groupname as you wish. It is suggested that you create a directory that matches your username ($PROJECTS/groupname/username) but that is not required. Everyone in your group will have read-write access to $PROJECTS/groupname.