Your system must have some kind of mass storage device, either a harddisk, a SSD or something similar, may be a SD-card. You will see those options in your boot settings in the BIOS.
By the way, 8GB of video RAM would be really uncommon, even high end videocards nowadays have a maximum of 4GB, it is more likely that you have a 8GB SSD in your netbook.
EDIT: Just looked it up, according to Wikipedia the ZG5 was shipped with either a 8 or 16GB SSD or a harddisk with 120 or 160GB.
Last edited by TobiSGD; 02-19-2012 at 02:46 PM.