As in the "hard drive" presented to your system is only ~175 GB? Yeah, that's uncomfortably small for a management server.
You will probably need to export your config, reinstall the OS, then import your config again to be able to upgrade. At that point, you may as well export the config, install R82 or R82.10, then import the config to the new version. It takes a while, but should leave you with a clean system which can be upgraded later.
When installing the OS, the installer lets you specify the size of lv_current and lv_log. Leave at least 2x the size of lv_current unallocated. This unallocated space is where snapshots go. 32 GB is normally plenty of space for lv_current, so that would mean at least 64 GB unallocated to ensure you can take at least two snapshots.