Android phone file transfer, KDE/KDE connect and mtp issues....

Just did a fresh install of Debian 10.3 with KDE Plasma on my Dell Latitude. Getting things fixed up and decided to work on a new youtube video. I plugged my Android phone to the laptop to begin the video file transfer so I can edit the video file on the laptop. Dolphin picked up the phone connection through USB and it popped up showing me the files/folders. So browsing my phone worked fine. But as soon as I attempted to copy the video file over it spit out an error that it could not read the file. Tried numerous times with the same result. I thought maybe it was my cord/phone port b/c I must have a little bit of dirt/debris in the phone port and sometimes the connector can get loose and lose connection. Double and triple checked the connector and it would still get an error when trying to transfer.

NOW, I did come across a thing called KDE connect and was able to transfer my video file that way. It worked, but it was a slow transfer (video file was about 800MB). Most of my video files are pretty big anyways.

Any ideas as to why dolphin/KDE was having issues? I did do some reading and apparently there have been problems with it in the past. Any other alternative ideas to where I can still use the USB cord? Any way to speed up KDE Connect (except maybe upgrading my router)? Any other alternative options I could try?