You restore an account from a tgz file that you exported.
Go to Preferences > Import/Export.
In the Import section, browse to the tgz file that you want to import.
Select the destination folder or create a new folder. Click OK.
In Resolve duplicates field, check the appropriate option for the account data being imported .
Ignore. Duplicate files are not resolved. All files are added back and the existing version of an item is kept.
Modify. Existing contacts and calendar data is updated, rather than replaced.
Replace. Items that have changed since the account data was exported are reverted to the version in the exported file. Old items are added back. New items that have been added to your account since the exported file was created are retained.
Reset. When this is selected, all items of the selected type under the selected folder are removed before importing new items.
If you want to import specific types of data from the tgz file, check Advanced Settings to expand the view and select the item types to restore.
Select specific types of items from the saved tgz file to import in the Data Types section. When you click Import only those item types are imported.
Click Import.