In this case the resulting corrupted files were not necessarily caused by a bad SD card. More than likely, the transfer process caused the problem, corrupting the files. Do not try shooting anymore with this card, because, you current images may be recoverable. You indicated that you do not have a card reader, you will need to get one in order to try to recover your photos.
With a USB card reader, you can connect the memory card so that it can be accessed like a removable hard drive on your computer.
USB CARD READER
For windows Try the Program Download at the link below. (This one will allow you to recover up to 1gb of photo files absolutely free and save them to a new folder on your hard drive.)
Make sure that before you open the program, after installing it, put the card in first. When you open the program, it will try to detect it when you
click on "Media Recovery".
If unsuccessful try (The ones below have a charge to save the recovered files)
For Mac Try
If the program is able to recover the photo files you will be given the option to purchase (usually around $40) the function that allows you to save and retain your photo files. Depending on how important these photos are, can determine if the cost is worth it.
Also, some retail camera shops and office supply stores offer Memory card recovery services if you do not feel comfortable running the process yourself.
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