GET /api/debug/external-storage/dump/

Streams a read-only dump of every byte in the installed external storage. The firmware reads bounded chunks and does not allocate the complete dump in RAM.

Auth: Bearer (powerUser). Mode: diagnostic mode must be active. Content-Type: application/octet-stream. Content-Disposition: attachment; filename=tr100e_external_storage.bin.

The response uses connection close to terminate the stream. A successful diagnostic must receive exactly the sizeBytes reported by GET /api/debug/external-storage/. A storage read error closes the stream early, producing a shorter dump. The endpoint never writes or erases external storage.