Board Thread:The Quarters - Q & A/@comment-141.239.144.11-20150914014051/@comment-25085701-20170312195745

Generally once a week is about a good timeframe to backup your data, but it depends on why you're backing it up -- if you're doing it for Fix Character Values purposes, you want to keep track a little more frequently to guard against accidental missed streaks and death by boss monster. And if I recall correctly, Completed To-Dos are supposed to be deleted about once a month, but they tend to hang around less if you have more Completed To Dos -- sort of a 'first in, first out, limit 30 thing?.'