A "combolist" (combination list) is a text file containing thousands—or in this case, 200,000—sets of usernames (often emails) and passwords. These are usually compiled from various data breaches across the internet.
: Hackers often lace these "free" lists with stealer logs or Trojans. When you open the file or the tool required to view it, your own computer becomes infected, and your passwords are added to the next "HQ" list. Download File 200K_Mail_Access_Valid_HQ_Comboli...
: This label is a marketing tactic used by hackers to claim the credentials have a high "hit rate" and haven't been "burnt" (detected and blocked) by security systems yet. A "combolist" (combination list) is a text file
If you are concerned that your information is in a list like this, do not go looking for the file. Instead: When you open the file or the tool
: Use Multi-Factor Authentication (MFA) on all critical accounts. Even if a hacker has your "valid" password from a combolist, they won't be able to log in without the second factor.
: Use reputable services like Have I Been Pwned to see if your email has been part of a known leak.