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I have a Canon 7D camera. When I put the Compact Flash on my card reader in the computer, it will not open the photos. I have 3 camera cards and only 1 brings up photos. These cards have all been formatted. We shoot in raw. Up until today, they all worked fine. FYI, I go into "my computer" and open up the card from there. What I see is 4 yellow folders. Three of them are "CRW" Files 847 Canon, 848 Canon, 849 Canon. The 4th one says Canon MSC and there are 3 CTG files in it. When I right click, the error message is "This file does not have a program associated with it for performing this action. Create an association in the Folders Options Control Panel" Can someone help me open these photos? Also, WHY was this working fine until now...and one of the cards still works fine?? We are nature photographers and have an order to fill for a gallery opening....Help please! Elaine

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  • Elaine Lefebvre Mar 13, 2011

    Thanks for your suggestion, but "no go" on the System Restore... I plugged in a date over a month ago, as problem is recent, and could not do it as no changes to the system had been made in that time period. Was worth a try, tho! Think I need some Canon support... Thanks, Elaine

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Open the card and run a file search for ,jpg files to see if they are in some other folder and let me know

Posted on Mar 13, 2011

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You might try to use System Restore in the Windows Help and Support section. This often solves a lot of tricky problems such as these. Go to Windows Help & Support, then choose "backup and restore", pick "Restore System", and see what happens. System Restore will not lose any of your files or pics, etc., and solves many problems.
Are all of the cards the same? Also, make sure the copper legs are clean on them. There is a program that can fix some cards, and retrieve pics, here it is:
http://www.tech-pro.net/how-to-recover-photos.html
I couldn't find anything on the web about CRW or CTG files, and don't have a Canon, so you might contact Canon Support to see if they can let you know how to open them. I'm just thinking that since they worked before, a Canon program could have gone bad, and may have corrupted 2 cards, but don't know your sequence of recording them.
Anyway, hope this helps, and good luck.

Posted on Mar 13, 2011

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