"An I/O exception occurred while copying the data from the item to its destination. Type: Xceed.FileSystem.DiskFile"
To resolve this issue, free up more space on the C:\ drive. First attempts could be to clean out temporary files and to empty the recycle bin.
The amount of disk space necessary depends on the relative size of the publisher database (including the size of your supplemental files folder, which includes attachments) and the amount of data being packaged into the remote database.