That is usually a permissions problem. The Destination location you have selected doesn't have the proper write permissions for your username. Change the permissions or select a different destination location
The strange thing is, that I haven't change anything in my system.
Anyway I will try to follow your advice. But how to change the permissions?
I also tried now to repair the permissions with the disk utility program but it didn't help.
thanks so far for helping!
What type of comtuper are you using? Windows or Mac and what version of Windows or OS X is it running? Also when did it do its last update?
MacBook Pro 2012
last update half a year ago.
a little bit more about my trouble history: the problem occured for the first time 4 days ago on lightroom 5.x.
I thought: good chance to upgrade to LR 6. First it worked for 2 days. But today: only misery.
Open the Import dialog window, click the Import button in the library module, and check the Destination location you have selected. Make a note of it then close LR. Open a finder window and browse to the folder that is selected in the LR Destination. Right click on that folder and select Get Info. At the bottom of the Get info screen will be the Sharing & Permissions sections. Expand that section, if it isn't already expanded, and see if your Username has Read & Write permissions.
I went up through the directory system checking the Sharing & Permissions section in the "Info".
I've started from the recent date-folder in which I wanted to save the picture: "2016" -> "pictures" -> "my username" to "User". There I found the problem that I (as the admin) was only allowed to "read".
I've changed it. know it works.
Glad you got it working.
In my limited 2.5+ years of using a Mac (now back to Windows) I found OS X to change permissions of folders all by itself for what I think is no good reason.
All the best to you.