AMD X570 users are well aware of problems with USB 3.0 devices. There are many remaining issues that make the use of the smaller ROM chip on X470 and earlier a real problem. Earlier the posted some comments on Reddit.

USB problems include crackling and intermittent disconnections. This made it impossible for updating Apple hardware with iTunes but the devices are able to update over WiFi given the storage is abundant.

AMD has prepared AGESA to deploy this update, and they plan to distribute to their motherboard partners for integration in about a week. Customers can expect downloadable BIOSes containing AGESA to begin with beta updates in early April. The exact update schedule for your system will depend on the test and implementation schedule for your vendor and specific motherboard model.