CT5v 2023 The dealer provided slightly detailed information regarding the recorder (See attached). It is almost useless. After many tries and various DOS formats with 64, 512, and 256 GB, the only card that worked was the 64GB. The card specifications match those in the attached file, V30. I got tired of buying cards so 128GB is unknown. Second request for support from GM is thus far unanswered. The first communication was "see the dealer". The technicians know mechanical items and some basic electronics. The advanced computer stuff seems beyond them. All video files are date stamped December 31, 1969 with file names like 00029_20230408T111608_MR__SOS_PR.avi. Thus, one can determine the date. It would be great if GM could update software to accept larger cards — if software is the problem. It is possible this is the case given the problem with date stamp.