Hey, as per this topic, https://community.cyanlabs.net/t/sync-3-error-codes/
LST_ERR05 – Error is LST_PKG_FILE_NOT_FOUND
This suggests you have a package named wrong or something, are you by any chance using a mac? can you share some screenshots of the contents of your USB. and also the contents of your autoinstall.lst and/or reformat.lst