If you are concerned your credentials are in this or similar lists, use services like Have I Been Pwned to check your email address against known breaches.
MEGA.nz is the host for the archive. Files with these names on cloud storage are often flagged and removed for violating Terms of Service regarding the distribution of stolen data. Risks Associated with the File 660 mega.nz by muchospasswords.7z
If you have not already, avoid downloading the archive to prevent potential malware infection. If you are concerned your credentials are in