A confounding variable is an extraneous variable that is related to your independent variable and might affect your dependent variable. In an ideal study, there will be no confounding variables.
For example, student accounts have a limit of $100 limit per day, while non-business accounts usually are limited to $500 withdrawals a day. For business accounts, the bank offers $1000 withdrawals in one day. Chase also offers customers a withdrawal limit of $1000 every 24 hours.
Answer Wiki. Evernote's system limits page defines the current maximum uploads per month for their different account types as 60 MB (Basic) 1 GB (Plus) and 10 GB (Premium). That's pure uploads which are pegged at this limit in any one 30-day period. So every year a Premium account subscriber can upload up to 120GB.