Hi, linking the computer and the android smartphone is no problem with KDE Connect, BUT I can only browse the internal memory in dolphin, not the SD Card. When I try to access the SD Card with Dolphin, it gets stuck for 10 seconds and then simply shows and empty folder.

Any ideas?

My phone is Bq aquaris U lite
KDE neon 5.10.3

Actually, you can. The files are not listed because of some bug, but you can go to the SD card in Dolphin, append to the path smth like '/DCIM' and see what's inside.

Not extremely convenient, but works.

A bug report - Bug 377058 - KDE Connect : SD card empty : https://bugs.kde.org/show_bug.cgi?id=377058