Update project_management.md

docs/cluster_guides/project_management.md

@@ -6,5 +6,18 @@
 
 ## Storage
 
+- [Disk storage guide](../storage/disk_storage_guide.md)
+- [Backup](../backup.md)
+
+???- question "What is this 'glob' folder in my home folder?"
+
+    - The glob directory found in your home has been deprecated since early 2017. 
+    - It is now a normal directory and shared your default 32GByte sized home. 
+    - The glob directory remains to not interfere with scripts who might reference ~/glob in the source code.
+
+    - Historically, the glob directory was the main storage area for storage of user data. 
+        - It was shared by all nodes. 
+        - The directory was used for files needed by all job instances and could house files exceeding the quota of the home directory. 
+        - Job input and output files was (and can still be) stored here.
 
 ## Members