Ok guys I have a jam 4 and a spiderjam. Had sd card problems from day one. I would actually just run the recording to my computer and save it. That is after so many attempts on sd cards. I have to say that the drum loops on these loopers/amps are so valuable to me for pratice that I just accepted it. I found the sd card that works with them though.
It's a 2gb Kingston
Just to let you guys know. I have tried every sd card there was. Even a 1gb transcend. But THE 2GB KINGSTON WORKED WITH ALL OPTIONS. JUST FORMAT IT IN THE DEVICE. Hope it helps someone.
Bobby