I was looking into getting an external hard drive and I see for example cnm core 120gb which is connected to pc by usb which also powers it.
My question is can the pc power the external drive without causing a problem as I see a lot of external hard drives which have there own power source?
My previous USB H/D had a separate power supply and you had to remember to turn it on before booting up, I have my mail store folder and other data, video and music etc. on my external H/D in fact I only have very little other than my O/S and programs on my C drive.
My new one is powered via the USB connection and I have not encountered any problems with it.
I would suggest you obtain as larger capacity one as you can afford, a 120Gb one I don't think is large enough. My original was 232Gb and my new one is 1 Tb.