What does 0.99 GB mean is that equivalent to 1 GB?

0.99 GB (gigabytes) means that the amount of data is slightly less than 1 GB. Specifically, 1 GB is equal to 1,024 megabytes (MB), so 0.99 GB is approximately 1,014 MB. While 0.99 GB and 1 GB are close in value, they are not equivalent, as 0.99 GB represents a small deficit of data compared to a full gigabyte.