Finally I found a proper way to sync my > 4000 photo's and video's from my Iphone to my Linux PC. I tried quite a few apps, but the one that works for me is PhotoSync ( http://photosync-app.com/ ). When I installed it it has options for webtransfer (but that needed a lot more memory then I had), but also for ftp/sftp. PhotoSync can sync pictures to any ftp/sftp server. My own ubuntu pc did not have an ftp server. So, on my own pc I installed "openssh-server" with sudo apt-get install openssh-server Then I could use my pc as an sftp server. After I configured the app with my new sftp server credentials (my own ubuntu username/pwd and the directory where it should upload) I could start the sync. 
Brengt organisaties tot bloei