Saw this deal in Woolworths at Newington. I couldn't find it on the Woolworths website so I don't know if it is available elsewhere.
It's a USB 2.0 OTG thumb drive with a micro USB end that is compatible with Android devices (says so on the packaging, haven't tried it to verify myself).
I bought one of these at 15 a couple years back, blew my mind, then found out lots of companies make them.
Either way, the read / write speeds are pretty decent, and it's a great way to back up your phone's stuff if it doesn't wanna plug into your stupid computer for some stupid reason anymore.
Was going to post this myself, just picked up some at $4 with many on the shelves - so if you are going past a Woolies, it's well worth a look.
10+ at Kingscliff
I have one of these, the get oddly hot when using OTG and are a bastard to get out of type A usb ports
Were $8 A month or so back. I found very limited stock then.