RSTP not installing on Cam v2

I have 5 Cam v2’s and have been trying to install the RSTP FW into them with no success. I have followed the instructions with no luck. I have 32gb cards (even formatted them to 10gb), renamed the bin file, made sure it’s FAT32, whipped the cards but with no luck. anyone have any other pointer that would help? I also have the latest RSTP FW.