According to this page it has USB available, and can use MicroSD.
I've bought MicroSD 2 GB card on Ebay (complete with an adaptor to allow it to go into card readers for MiniSD and SD) for a few pounds.
An SD card adaptor (to USB) should cost no more than a quid at Poundland (or on Ebay, if lucky - I have a number of them now, as I have a few older PCs without any built-in card readers)
Not having the phone, don't know if there is a USB port on it (or micro USB port which is more common these days). Have checked here and Vodafone "what's in the box" mentions no USB cable.
So, sorry if no USB... it does have Bluetooth (but from a PC it might be a pain transferring files, if it's anything like I've experienced so far).
I'd suggest grabbing a cheap MicroSD card (will find the ebay seller if you want, as you will probably want it with the adaptor).
Hmmm, seeing it has FM radio, can play music, and is on Voda (so I can put a cheap Asda SIM in) I might be tempted to get one...
Oh no, they don't sell it on PAYG, so it will be a while before they appear on ebay s/h. too, as people in contracts will be using them.
Looks like the website GSM Arena has wrong info about USB. Maybe Vodafone do different models abroad, and some have USB.
Looks like the MicroSD route is the best. Warning From the Vodafone website: MicroSD Maximum memory supported 1GB