what files did you include in it? may be I'm missing something that should be there
I include the following:
- blocks folder
- peers.dat
- trie.dat
I included the same.
And, before making the archive, I made sure the files wheren't open by any process, using "fuser".
I'm a windows user anyway and don't know the equivalent of "fuser" in windows but at least I would wait for a while after closing the wallet before copying the files.