Google's Android File Transfer app has a reputation for failing at exactly the wrong time—especially on newer Macs and Android versions. If it will not connect, open, or show your files, here are five fixes worth trying.
Open USB preferences and change the connection from charging to File Transfer (MTP).
Many USB-C cables only provide power. Try a cable specifically rated for data transfer.
Quit the application completely, unplug the phone, reconnect it, unlock the phone, and reopen the app.
Tap Allow if Android asks for access to phone data or whether to trust the computer.
A damaged or outdated installation can cause connection errors. Reinstalling Android File Transfer may help.
SEYFR avoids the MTP-over-USB dependency and transfers the original files without an account, cloud storage, file-size limit, or compression.
Open SEYFR and select Send.
Choose Photos, Videos, Files, Documents, or a full Folder.
SEYFR generates a QR code and secure token. Share the token with the Mac receiver.
Open SEYFR and select Receive.
Paste the token.
Optionally choose a destination folder.
Click Receive.
Read the full troubleshooting guide
Have you found Android File Transfer reliable, or did you switch to another workflow?