I recently bought a Model 16, but no matter what SD Card I try (SD, SDHC, SDXC), it tells me 'No Sys File. Would you like one created?' and I click enter. Then the screen says 'Card Protected. Change Card'. After several hours back and fourth on my computer, formatting and re-trying cards, ensuring the formatting for each card matches Tascam requirements, I gave up and decided to return it. I'm doing an even exchange for a new model, hoping that resolves the issue, but I wanted to check here to see if anyone else has experienced this same problem? Extremely frustrating and there doesn't seem to be any helpful resources online. Am I the only one who has this issue?