How to create a differential backup

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Sep 13, 2019

Backup4all Professional/Standard 5.x - 8.x

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How to create a differential backup

This article shows how to create a differential backup of the given sources to a specified destination using Backup4all. The current method can be extended to other sources and destinations supported by Backup4all.

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The differential backup type will create a full back up on the first execution, then only differentials will be performed (all new and modified files since the last full backup execution). It will create a new zip file in the destination with the backup sources from each source drive.

How to configure a differential backup job

  1. Open Backup4all and select File -> New (Ctrl+N).
  2. In the Where do you want to save the backup? section, select a backup destination.
    Differential - Destination
  3. On the What do you want to backup page, add the backup sources. Press Next.
    Differential - Sources
  4. On the Filter the backup sources page, you can set include/exclude filters for backup sources. Then press Next.
  5. On the How do you want to backup page, you can choose the backup type and the encryption.
    Differential - Type
  6. On the When do you want to backup page, you can set the backup job to automatically run on the specified time and days. Press Next.
  7. On the Personalize your backup job page, enter a name for the backup in the Backup name field.
    Differential - New job
  8. Press Save->Save and run.

Backup execution examples

We will perform several backup executions to see what we get in destination.

  1. As we have sources from C and E drive, after the first backup execution, we get in destination a zip file for each source drive: 1_C.zip and 1_E.zip
    Differential backup - 1
  2. For the second backup execution we will add a new folder called 03 in backup sources from the E: drive.
    Differential backup - 2
  3. After the 2nd backup execution we get in destination: 2_E.zip which is the second backup version, containing only folder 03.
    Differential backup - 3
  4. For the third backup execution we will change an existing source file on C: drive.
    Differential backup - 4
  5. After the 3rd backup execution we get in destination: 3_C.zip and 3_E.zip which is the third backup version, containing all new and modified files since the last full: the modified file on C: drive and the 03 folder from E drive.
    Differential backup - 5