There is something wrong with import - speed. My setup is laptop + NAS. On laptop's local SSD drive I have digikam.db, NAS (Synology) is a datastore for images. When I copy images from laptop to NAS (using dolphin) the average speed is 20-50MB/s. The same set of images imported from MPT device (Samsung smart phone, connected with USB) or local folder on SSD drive (using CTRL+ALT+I) makes the process sloooow. When I monitor the LAN speed during import I can see weird behavior. Net usage is generally very low, with some occasional peaks. From DK point of view I can see progress, but it is very very slow. The first images are going well, but soon (3-4%) there is huge slowdown and it forces me to interrupt the process. The scale of import is about 350 images/video files (10GB of data). My system is Kubuntu, Digikam package from Phillip5 ppa. Regards P.
To perform this MTP operation you pass through the Gphoto2 driver. Try the USB Mass Storage way, it will be faster. Gilles Caulier
To use mass storage USB I had to remove SD card from my smartphone which is not a convenient way. But what can I say now (DK 5.6) is that importing from smartphones works better = with good speed when it finally connects to system. Anyway MTP is terrible and cumbersome. I don't now why it started to work more or less reliably, but for now we can close this bug I guess. P.