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Thanks for your reply. Yes, there are a lot of folders. But as the first solution of this kind, using caching and adjusting the amount is quite possible. After all, you can specify to go in order, collect data not in the browser’s memory, but write it to the same database, for example, then from there with the indication of threads to process. Yes, and you perfectly said that there are solutions from the server side, but their problem is that they usually do not find viruses. But your plugin is a great solution. Of course, therefore, there is a temptation to process many folders at once)