To access an existing archive backup on a Cloud or disk, use the "Join Backup" command under the File menu. Select "BigCloud Archives Online" or "Local or Remote Disk", and click "Choose Backup Location" to select the Cloud or folder where the backup is located. You may specify a location other than the default where you would like your local copy of the archive to be stored, then click OK. If you have write access to the backup (if it is on a Cloud you own, or a remote folder), when you Sync you will upload your changes and download changes backed up from other computers. If the backup is stored on someone else's Cloud, syncing will pull down the latest from the Cloud, but any changes you have made locally (e.g. adding tags) will not be backed up.