I am using a Kingston 16GB Micro SD card with adaptor in my EPL-1. Take a lot of photos and upload them to my PC. Just recently getting an error message on the camera screen. Sometimes goes away and then usable. Reformatting did not help. Think I solved the problem. Just bent the adapter a touch with the card inside, no no problems. Figured the micro SD card in the adapter wasn't making perfect contact with each other. I do remove the adapter a lot so it can be inserted into a card reader. Must have flexed it a bit too much over the past year. Something to try if you encounter the same error message.