128M=approximately 110M-115M

256M=approximately 220M-230M

512M=approximately 460M-480M

4GB = approximately 3.6GB-3.8GB

8GB = approximately 7.4GB-7.6GB

16GB = approximately 14.4GB-14.8GB

32GB = approximately 28GB-29GB

64GB = approximately 58GB-59GB