Video file issues when re-muxing/appending (corrupted file?)

[Augustus]

Thanks for the input here.

No issues for me with usb port looseness or cable disconnects. Solid connections with my setup. I had checked for that, wiggled the cable etc. Gone over some nasty potholes to....
Connection issues on PC, seen that, usually a damaged/worn or poorly made port or cable.

Definitely this, crap cable or poor quality enclosure leads to problems. He also didn't specify what SSD was used, which doesn't help compatibility troubleshooting like folks are trying to do at the moment. Was it a SATA SSD or NVMe etc etc