Fernando wrote:I found two downloads at the BM support page.
I wonder if these are the ones I need?
No, you need the "Blackmagic Camera 6.8 update" - and as Robert suggested, try a different cable. Or better, if you have any chance of using a MAC or PC with an USB 2 port, try it there.
Since this is your first update, this might be a bit of a hassle. But after that it gets easier, because BMD has fixed the USB-problem in newer update-versions.
Fernando wrote:Can it be updated with a SD card internally?
Sadly, no.