Hello!
You can clear the logs to release the disk space through the Web UI and through the CLI.
Click Dashboard web , In Log Storage, select the service logs to be cleared and click Clear; or run the clear disk type command. or run the clear disk type command. For more details, check "https://forum.huawei.com/enterprise/en/Dr-WoW-Q-A-How-Do-I-Delete-Traffic-Logs-for-USG6600/thread/526539-867".