I recently upgraded from my external 1TB storage to Crucial X8 2TB and immediately began having recording issues. Basically, recordings looked good for 3-5 minutes, and then would severely stutter or freeze after that. I assumed this Crucial X8 2TB storage just wasn't up for the job, but it didn't make sense because the throughput of the recordings wasn't even close to the max bandwidth on the device.
I currently run macOS 13.2.1 on a macMini M1. I'm running a beta version of Channels DVR (2023.03.02.2150), but have almost always been running the beta version without issues on previous storage.
My previous storage was an external UGREEN NMVe enclosure with 1TB Intel 660p NMVe. Connection is via USB-C. It ran warm when recording a few streams, but I never had issues except for lack of space.
My current storage is an external Crucial X8 2TB device. Connection is also via USB-C. Drive comes pre-formatted in ExFAT, and Crucial has several recommendations and FAQs to keep it that way to optimize the drive - even for macOS users.
In the end, after trying several things, I went ahead and re-formatted the drive to APFS. Not only is my Channels DVR performing wonderfully for recording/playback, I can see that the drive access speed has substantially increased - using BlackMagic Disk Speed Test.
My suggestion would be to use APFS for your external storage on macOS if you start notice recording stutters or if you are setting up a new external drive. I'm guessing this same thing would apply to the Crucial X6 storage. Device is a little smaller and also has slower max speeds - theoretically still much faster than anything you'd be recording with Channels DVR.