Application SD to USB Host

sequenceDiagram
participant UI
participant U as USB Runtime
participant W as Wi-Fi Runtime
participant L as LoRa Task + Board
participant G as GPS Runtime
participant O as Track/File Owners
participant SD
participant M as MSC
UI->>U: start
U->>W: suspend (no saved setting change)
U->>L: pause tasks + radio standby
U->>G: suspend
U->>O: quiesce/flush
U->>SD: unmount
U->>M: start
UI->>U: stop
U->>M: stop
U->>SD: remount
U->>G: resume
U->>L: resume tasks + RX
U->>W: resume if enabled