You should have sufficient amount of free space to unpack the application and data from your shipment. This could range from 1GB to 64GB. The package size will grow as product updates are released. The amount required is the unpacked directories and files from all
*.tar.gz in the shipment package.
Rosette Enterprise also requires space to hold logs and other temporary files. Logs can grow depending on the log level and the number of calls. If you have a log rotation mechanism in place, a couple of GBs should be sufficient. Otherwise, experiment with your call patterns and plan for growth accordingly.