The message indicates that you do not have the proper permissions. You need to check the destination folder to make sure it has WRITE permission.
Check the destination folder, it might not exist longer.
If you are importing to the external drive then, Please set correct permissions to your external drive.
- Chose your External Drive > Get Information.
- Under Sharing & Permission, verify that your have Read & Write Privileges. If not, click the padlock icon at the lower right, enter your password when prompted, then click the Read only entry and select Read & Write.
- Then try to Import in Lightroom.
Upon my research it is telling me I have read permissions only. Then there is no padlock option given to me.
Are you working on Mac or Windows?