I copied my lightroom folder to my external drive, no problem. From my external drive tried to copy the lightroom folder to my laptop. I've done and succeeded doing this several times. MESSAGE: The finder can't complete this operation because some data in "IMG_0203.cr2" can't be read or written. (Error code -36). This happened a few times, I delete the file, same message with different file names, same erro
run a diskcheck on your external harddrive or use some other method to move your files.
If you are using Mac computer .
Run Disk Utility and then run repair disk permissions for both Mac HD and Ext HDD
Applications > Utilities > Disk Utility.
Once the repair process is completed , try again .