According to a support site (Link here ), Error 70 is an image-related issue, but that could be for a bunch of reasons: and these are the easy options for you to consider:
a) A memory card that is not working properly. This can be caused by a configuration error, a bad card, or using a micro SD card with an adapter - not recommended, always use full-size cards
b) an error with the lens. Is the lens you are using a Canon native lens or a 3rd party one? Is it an EF or EF-S unit attached by an adapter, and if so, is that a Canon adapter or made by a 3rd party?
c) a battery related issue - less likely I would have thought but working down through the options.
I would suggest exploring each of these possibilities and if none of them seem to be an obvious point of issue, then call Canon support 1-800-OK-CANON
cheers, TREVOR
The mark of good photographer is less what they hold in their hand, it's more what they hold in their head;
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
