1gb data storage will give approximately 280 hours digital recording or  Approximately 250 MP3-encoded songs can be stored in 1 GB of memory on an MP3 player, memory card, or computer disk.

Many digital voice recorders and "MP3" players can also store music that's been saved in Microsoft's own compression format, called WMA. WMA files take about half the space of MP3 files, so a digital voice recorder that can handle them can store about 500 WMA-formatted songs within 1 GB of space.