Android file transfer

How it works

There is no AirDrop. USB debugging is not required for a simple file copy and should not be turned on for one. Storage permissions decide what a browser can see. Background uploads stop when the app is restricted.

A field phone uploads 900 MB through Chrome on Wi-Fi with a resumable page. Battery optimization had been killing it. Exempting the browser finishes the job. Nearby Share covers the 20 MB case to a colleague in the room.

How it differs

Android file transfer is not a desktop sync unless a vendor client is installed.

A cable copy that only shows DCIM misses downloads the user meant to send.

Confirm the folder.

On the ticket

• The practical close is a log line: time, actor, byte count, result.
• Without that line the transfer is a story.
• With it, the next person can see whether this door did what the ticket claimed.
• If the path is shared, say so in the partner profile so a later change does not silently pick a different limit, key, or region.
• On a real ticket, write down the door, the byte count, and the clock.
• For android file transfer, that means naming the host or bucket, the expected size, and the time the other side must have a complete file.
• A progress bar is not that record.
• A 200 response that arrives before the complete call is not that record.
• If a retry is allowed, say how many and whether it resumes.
• If a person must approve the send, name the person.
• Partners who receive android file transfer files should match on hash or size before they import.
• A same-length corrupt file passes a size check and fails a hash.
• Keep the published hash off the only channel an attacker can edit, or treat it as a corruption check rather than a substitution check.
• When the path changes, new key, new region, new cap, update the profile the same day so the next run does not use a stale limit.