There is no hard reset functionality as of yet.
I believe for my experience the better can do is contact with suport email.
They make a very effective and quickly service
Please let us know what you find out about the Reset from support. I haven’t seen it being mentioned before.
Your option for the 128 GB SD card is to use it in your Android device and transfer the 1080p videos recorded onboard after each dive. There’s about 17 GB free on my SD card in the Trident.