Same/similar issue here. Ubuntu 16.04 + Samsung Galaxy Note 8 - works Ubuntu 18.04 + Samsung Galaxy Note 8 - doesn't: very slow, lost devices. Completely impossible to move photos via MTP KDE Neon 18.04 - doesn't works as well
I think that it's something with mtp-tools/libmtp
For me only one reliable way to transfer photos via MTP - Android File Transfer for Linux https://www.omgubuntu.co.uk/2017/11/android-file-transfer-app-linux
Same/similar issue here.
Ubuntu 16.04 + Samsung Galaxy Note 8 - works
Ubuntu 18.04 + Samsung Galaxy Note 8 - doesn't: very slow, lost devices. Completely impossible to move photos via MTP
KDE Neon 18.04 - doesn't works as well
I think that it's something with mtp-tools/libmtp
For me only one reliable way to transfer photos via MTP - Android File Transfer for Linux https:/ /www.omgubuntu. co.uk/2017/ 11/android- file-transfer- app-linux