It looks as if you do not have enough RAM or free space on the disk.
How much RAM do you have in your system?
How much free disk space do you have on the drive C and on the export target drive?
Try closing browsers, folders and any other open applications apart from LR. Then select the single image 3648 in the Library - go to the Folder (instead of previous import). Press Ctrl+S to save metadata. Then click the Export button again.