Some Snapdragon 888 and 8 Gen 1 devices (S21/S22 Ultra) have fragile USB controllers. The patched Odin’s aggressive handshake timings have been known to cause the phone to enter a QDLoader 9008 mode (deep brick). Always use a USB 2.0 port, never a hub.
Summary
: The largest file containing the core Android OS.
Odin 3.14.4 patched version is a modified version of Samsung’s internal flashing tool, often distributed on communities like XDA-Developers
Flashing firmware always carries a risk of "bricking" your device. Experts on XDA-Developers