(Note: 3.26 MB is roughly 3,338 KB or 3,418 KB depending on binary vs. decimal conversion).
A 128kbps MP3 file with a size of represents approximately 3 minutes and 33 seconds of audio . This specific file configuration is a legacy industry standard that balances storage efficiency with "acceptable" listening quality for casual use. Core Specifications
Understanding Audio Bitrate: A Guide for Better Sound Quality