I have a Samsung Galaxy S4 (GS4) and S3 (GS3). Trying to move files an external Toshiba drive.
I had problems writing to the Toshiba, but was able to find solutions in this forum and it is working now. I think.
When I attach my GS4 to my RaspberryPi 3b, it shows up as: mtp://[usb:001,008]/ or something similar. After a while it says "Unable to open MTP device '[usb:001,008]'" and cycles to something else like mtp://[usb:001,009]/. If it does this while i'm moving a file it stops moving the file. If I get lucky and it moves 100% of my file, I get "...: libmtp error: Could not get file from device." and mtp://[usb:001,nnn]/ changes again.
I tried searching the forum, but was unable to search for USB issues as "USB" is not an allowed search term. And "Android", "Samsung", and "Galaxy", give to many results to search through one by one.
So, where should I look to figure out what's going on and how to fix it?

