By default, every user should have a .sge_request file in their home directory. This file contains a line like this:
-l h_fsize=10G
This limits the size of all created files to 10GB. If you plan on creating larger files you should increase this limit, either in the .sge_request file before you start your qrsh session, or in the batch script you submit via qsub. From the command line, you would start a qrsh session as follows:
qrsh -l h_fsize=300G