Home directories - 

Home directories are meant to store small files only. All home directories are restricted by user quotas and the quotas varies as per experiment. 

You can use "quota -s" to check your quota. 

All home directories have a daily backup and snapshot policy. Backups are kept for 30 days and snapshots for 7 days. 

Snapshots can be accessed by navigating to the .snapshots directory. 

Central Storage - GPFS/Lustre

GPFS and Lustre data are meant for large files. Please copy files locally to scratch area on compute nodes before you analyze them with ROOT.

Quota can be viewed using the link below for RHIC/ATLAS users. 

https://monitoring.sdcc.bnl.gov/Facility/GCE/GPFS/