Why Does a Formatted Drive Have Less Space Than Advertised? Share March 8, 2023 Dm4r Technology A gallon of milk is a gallon of milk, but a terabyte of hard drive space may not be what it says on the box! The difference between advertised and reported drive capacities is easy to explain. Read This Article on How-To Geek › Source : Why Does a Formatted Drive Have Less Space Than Advertised?