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Hi @victor307
I hope you’re well today!
Yes, it is from Smush plugin and it can be safely deleted at any time (regardless of whether you removed the plugin or not).
It’s a log file and it’s kept there because it may possibly include some information useful for troubleshooting various issues. But you can safely delete it at any time.
Kind regards,
Adam
Thank you very much Adam, I will delete the file @wpmudev-support8