d y 2 years ago Hi I have recently purchased a used GYHM100E. I bought Class 10 SDHC cards 32 and 16 gig. I am having problems - when I start recording it starts up for a second or two then I get error messages - management error and Im prompted to recover the file. This will typically happen a few times before settling down. I assumed that I had old firmware having checked other forums however the firmware is 1.11 arm 1.07 eeprom 052, so it looks current and supposedly compatible with class 10 cards. I also cant format. When it does record the image is fine, but its erratic. Can anyone tell me why?