To know your quota and the space used, once connected on the cluster type the following command : quota -s
$> quota -s Disk quotas for user mylogin (uid 1076): ... 60G 100G 120G 2096k 0 0
-> The user mylogin has a quota of 100Gb with a temporary tolerance of 120 and is already using 60Gb. This leaves 40GB available.
If you exceed your quota, you will have to delete files via the rm command or move some of them temporarily to your ComputeSpace, a storage space dedicated to unsaved calculations.