Hi,
the sx70 is a new DIGIC 8 camera. The only thing we
know assume about its firmware is that it is no longer a PowerShot firmware.
Our Canon Basic
dumper will very likely not work on it, and there's a good chance that my experimental Canon Basic
script won't work either.
If you'd like to still try dumping it, you can try contacting
a1ex as he already managed to dump another DIGIC 8 model (the EOS M50).
If you were only looking for for a quick hack, then I'm afraid that there isn't anything we can currently offer...