Files uploaded to Content > Media Manager > Documents will be available for download on /downloads.php as well as any webpages or emails the links were shared. To review the number of downloads per file to measure the interest and engagement of your audience, Web Statistics reports are helpful.
Go to General > Web Statistics.
Click the Downloads report.
The Date filter will default to the current month. Update that filter, as needed, and click Refresh.
Review the Downloads column in the table to see how many times each file was downloaded during your selected timeframe.