usb flash drive

To replace my alpine unit: http://www.caraudiocentre.co.uk/product_m-sony-dsx-s100_p-26092.htm Has anybody got one of these? My specific question is how long does it take to read a large USB & does it do this everytime the unit is powered up? My alpine is abit odd, because it can only store...

My head unit in the van has a front USB connection, which i had hooked up to the mp3 player etc, but i don't often take the player out or want to leaver it in the van, so i needed a daily flash drive, i knew i wanted a small one so i order one of these, 8gb version in with red band and LED to...