max number of local archives in snapshot

Hello. I don't understand how many number of "local archives" to set as the maximum for my snapshot backup. I'd like to backup once per week, and it's suggested to set the number to 52 archives max, but does that mean that I'll have 52 different zip files stored in my dropbox account by the end of the year? I only have a little over 3GB total in my Dropbox account.