we have rebel t2i. it says no disk. Tried to factory reset but still same problem. pls help

[mycannon]

Tried new disk but it keeps saying it is write protected.

What should we do?

[RobertTheFat]

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@mycannon wrote:

Tried new disk but it keeps saying it is write protected.

What should we do?

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Well, start by making sure that the "write protect" switch on the card isn't turned on. That's what the camera is telling you the problem is. And it can't be cured by a factory reset.