Apple's planning to double up on the amount of built-in storage offered in its entry-level MacBook Air model,the inbuilt SSD drive is likely to be doubled from 64 GB to 128 GB, up to a maximum of 256 GB for the high end models. The default RAM configuration of 2 GB will also be doubled to 4 GB.
The new MacBook Air range is expected to release at the end of next week.