Hmmm yeah I've actually tried both of these methods already. Did the normal format to fat32 first (a few times just to be 100% certain I was choosing the fat32 option). Then I did see that there was a second partition on there. So I did the command line clean thing. Made sure there was only a single partition and formatted again. I've tried these things a few times now and nothing has worked. Only thing I've not tried is formatting via the command line. Have used the right click, disk management and Mac's disk utility options.
Beginning to think the USB stick is just stuffed. Although the computers can see it, read and write to it just fine.
It's not that big a deal really. USB sticks are cheap, I'll grab a new one. I thought it might have been something simple. I had this USB drive laying around and I thought it would work better than the old 2GB SanDisk one I've been using.
I believe the old SanDisk one is causing issues with wifi transfers. They often error out. I believe because they can't write fast enough to the USB and everything times out.
Thanks for the replies though! ?