Still needs a big harddisk

I was hoping that I can simply put all my work stuff in a flash SD card and then simply bring it to work. It didn't take long for me to realize that it didn't work out all well as I expected. The read/write performance is one issue (particularly when read/write from the SD card reader build into the laptop), but most importantly my 4Gb card is not big enough to store the iTune Library for me the sync Podcast with. So eventually I still need to bring my 320 Gb harddisk, which is not too bad.