New answers tagged sdcard
Yup! I can answer this one... put the card into your computer and manually erase all the data on it. When a canon 60d or 70d can't read data on the card (like it was used in another camera), it will say the card is locked because it doesn't want you to overwrite the data.
Either your 600D has failed and needs servicing or the new card you have purchased is not compatible with your camera. I would recommend that you consult Canon's service department or, if cost is an issue, a local repairer. Most camera shops will be offer a service or be able to put you in touch with someone.
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