Can't record on external SanDisk on Final Cut Camera, stuck at 00:00:00

When trying to record onto my external USB-C SanDisk flash drive (with fast enough specs) on Final Cut Camera for iPhone 15 Pro Max, it starts and get stuck at 00:00:00. Going to my normal camera, I can record film which goes directly to the external drive just fine. Which I can see in the Files app.

Heres a link to the drive: https://www.amazon.com/dp/B0CKJ8YDRK