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Article Reference ID: 1022
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Understanding Local Backup

This lets you keep a snapshot of your last online backup locally, so that you can immediately restore from your local backup, rather than wait for a restore request to be fulfilled. This provides you with a second level of protection as well as convenience.

Local backups occur simultaneously with your online backup, and back up exactly the same files. If your online backup stops in the middle of a backup, your local backup continues. If the local backup drive is unavailable, your online backups continue as scheduled. The next time the local backup drive is available, your data is backed up to the local drive. If you remove a local backup drive after a backup and replace it with a new drive that does not contain any backup data, all of your backed up data will be synchronized to the new drive, as long as it has the same drive letter. If a local backup occurs when an online backup cannot occur, such as if you have no internet connection, the status will show either Preparing data or Communicating with server until the local backup is complete.

Unlike your online backup, the files in your local backup are not encrypted. This means your data can be readily accessed by you or someone else using the same drive. If needed, you can use programs such as Bitlocker or Truecrypt to encrypt your data on the local drive. If you do directly access your local backup files, and if you do delete any folder in that backed up set, that folder will no longer be backed up locally; however, it will still be backed up online. If a restore is ever necessary, the files will be restored from the online backup.

Just like your online backup account you can see local backup events in your history, but you will see only whether a local back up was successful; you will not see details. Only final status information is provided for local backup, though during a local backup to a removable drive, you may see indications of drive activity.

If you change your settings to exclude something, or if you delete something that had been selected for backup, those files and folders are no longer restorable from the local backup. However, because online backup stores files for 30 days, a restore can still be done from your online backup.

The maximum size of your local backup is the same as your online backup account. For example, if your account is limited to 2 GB, then your local backup is also limited to 2 GB.

Requirements for Using Local Backup


  • Local backup works with either the NTFS or FAT32 file system; however, FAT32 does not support backing up files larger than 4 GB.
  • You can use local backup with an internal drive, or an externally attached USB or Firewire drive; however, the drive must have an assigned drive letter. If the Status window shows that the backup was successful, but you also see this message, An attempt n minutes ago was incomplete with a link to LocalBackupError0, this means that the online backup was successful, but that the local backup was not. This is because the drive you had used for local backup is not connected.
  • You cannot use local backup for files that are locally EFS encrypted. If you are backing up EFS encrypted files online with Secure Backup and Share Desktop Client, you must deselect them before your first local backup with Secure Backup and Share Desktop Client.
  • If there is not enough room on the drive selected for local backup, the local backup fails and DISK FULL is entered in the error log file. Because the local backup failed, no files are written to the drive, and therefore the drive will not actually be full as reported in the log file.
  • Avoid deep file paths. Local backup cannot back up a file with a full path and file name that is longer than 260 characters.
  • Local backups are made to the root of the drive. You cannot specify a path on the local drive, to back up to a specific folder on that drive.