Hi,
[SOLVED]
I was able to fix this for me. Hope this helps someone else.
I got the "device unreachable error" while trying to transfer videos from my Samsung S23 to Windows laptop. Funny enough, I was able to transfer photos without any problem.
I was able to fix this by clicking on the "USB file transfer turned on" from the notifications. This opened "USB Settings". When I scrolled down to the bottom, there was "File transfer options" settings. I turned on Transcode exported video option and this fixed the issue.
Hope this helps.
Cheers!
I also had success going thru "Tap for other USB options" in the "USB file transfer turned on" notification on my S23. There are 2 options. In my case, I kept "USB controlled by" on "This device", and then only changed "Use USB for" FROM "Transferring files / Android Auto" TO "Transferring images".
I'm not sure why the USB interface is designed this way. After my images are transferred I'll have to remember to change it back so I can use it in my car, and then remember this re-setting at some point in the distant future when I transfer photos again.