Hi there. My name is***** would be my pleasure to assist you with this. I'll need to ask a few questions in order to give the best possible answer. Do you perhaps mean the Olympus tough 3000 rather then the 300? IS this the one where you have to open the batteries door to get to the battery storage and the card storage area? If so, open the battery/card connector cover, then press the card over in, until you hear it click. It should pop up slightly, allowing you to grab it and lift it out. As always, when removing memory cards it's best for your camera to be turned off to prevent damage to the memory card. If the normal steps that I have provided for you don't work, please provide more detail about the adapter that he used so I can assist further.
I've provided a link to the manual for this computer just in case you should need it in the future. You can print it, or just save it to yoru computer to refer to later.
Please let me know how my instructions. worked for you. If you need more help, I am happy to assist. I am committed to working with you until the problem is fully resolved.
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