If You're new to Samsung Galaxy S (aka i9000) and You have problem with connecting phone in Mass Storage mode to your computer via USB (only new hardware Samsung_Android in My Computer -> Devices) try downloading and installing drivers: http://drivers.softpedia.com/progDownload/Samsung-Galaxy-S-USB-Driver-for-Windows-x86-Download-96692.html 0. if Your phone is conected via USB disconnect it. 1. first try without debbuger mode -> Settings - > Application -> Developing -> USB Debugger = off ) 2. download and install drivers 3. connect your phone via USB, (in My Computer there should pop-up two new disks - but You won't be able to enjoy them :) ) 4. bring the topbar (notification bar) and select: Connect USB -> Connect ... now it's done... now it should work