I have a problem with my SD card, a week ago I replaced my SP Silicon power 16GB 10th generation card with another card, when I put it beck into the camera, it said that card needs to be reformatted, I tried to format the card with camera, but couldn't, so I took it out again and put it in my leptop, but the problem is that leptop doesn't read it, it doesn't even show that the SD card is plugged in, so what could be the reason of that? before I did this, I kept the card in my wallet with some coins, could that be a reason? or maybe some virus ?
From the symptoms you describe a virus is highly unlikely. Physical damage is a high possibility. When placed the card in the wallet, if you then placed the wallet in your back pocket and sat down this could have put significant stress on the card resulting in damage.
If this is the case card is probably beyond economical recovery. If there is any particularly important photos on it, they may be recoverable by expensive specialist companies.
Even if this card does somehow start working, I would not recommend using it. To do so would risk losing your photographs.