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This window contains special settings for zip file creation. The button is available only for full, incremental and differential backup types.

Prefix

Customize zip name prefix

Typically the name of the zip file is something like: "1_C.zip", "1_D.zip" etc. (one zip for each drive). The names of these zip files do not make much sense for the user but they can be customized by pressing the Insert tag button. Following tags are predefined:

·	Backup Name (<BACKUP NAME>)

·	Backup Number (<BACKUP NUMBER>)

·	Backup Type (<BACKUP TYPE>)

·	Backup Date (<DATE>)

·	Backup Time (<TIME>)

·	Backup Year (<YEAR>)

·	Backup Month (<MONTH_MMM>)

·	Backup Month - numeric (<MONTH_MM>)

·	Backup Week (<WEEK>)

·	Backup Day (<DAY>)

You can also add your text in the edit tag field. Use the Preview button to see how the names of the zip files will look like.

Windows does not allow the following characters in the file name: / \ * ? : < > |

Therefore Backup4all will prompt you to change these characters if present in the Customize zip name prefix field.

Split

Split type for zip archives

The first combo contains predefined values for the archive size. By default this option is set to Automatic: this means that the size of the zip is limited to the maximum file size allowed by the file system. Other predefined values are provided for floppy disks, zip disks and different CD media types.

Sometimes these predefined values are not enough. Therefore you can select Custom size in the combo and specify the maximum archive size you want. The minimum span size is 512 kilobytes. The value in the Size field means that each span should not exceed this value. However, because of the zip algorithm limitation, the system might create spans with size up to 32-64 kilobytes smaller than this value.

Create independent splits

This option is checked by default and it's recommended to leave it marked. If you have a large backup that spans over several removable media (CD/DVD, floppy) each spanned backup can be independently restored. Thus, if one of the spanned backup disks is corrupted you can still restore the other files.

Example: you have a backup that was spanned over 20 CDs, and you didn't leave the Create independent splits option checked. If you need to do a restore and one of the zip files is damaged, you lose all the data from the 20 CDs. Now, if the Create independent splits would have been checked, even if one zip file would have been damaged, the data from the other 19 could have been recovered.

Each zip file created with Backup4all can be extracted with standard zip utilities. However, when using the Create Independent Splits option and backing up a file big enough to be split into more than one zip file, you will need to perform an additional operation if you want to restore that file manually (without using Backup4all).

Compression

Level

You can set different compression levels for the backup:

·	Zip without compression (Fastest) - files are just copied inside the zip archive, without any compression

·	Low compression (Fast) - select this option if the size of the zip archive is not important, but the speed of the backup is

·	Normal compression (Medium) - this is usually the best choice because it provides the optimum rate between zip archive size and the backup speed

·	Best compression (Slow) - use this compression level to reduce the zip archive size as much as possible (the backup speed is reduced)

Use No compression or Low compression if you backup large files to speed up the backup process. Use High compression when you want to create the smallest archive possible. This option takes more time if the files included in archive are large.

Filter

The filter can be applied to increase the compression performance. It defines what types of files to be stored uncompressed in the zip file. These are files that are already compressed (e.g. zip, rar, mp3 or avi) and using the zip compression on them wouldn't result in a smaller sized backup. You can use the already defined file types or you can add others using the Default compression filter list in Tools->Options->Backup. The result will be that the backup will take less time when using compression.

Other

Always use temporary folder to create zip files

If checked, the zip files are created in the temporary folder and then moved to the destination folder. This means that there should be enough free disk space on the drive where the temporary folder is located.

When backing up to removable media (CD, DVD, floppy, zip disk, etc.) this option is ignored, the zip files are always created in the temporary folder and then copied to the destination. When backing up to internal hard drives or LAN, you should uncheck this option to speed up the backup execution. By default this option is not checked.

Use alternate zipping mode

If not checked (default zipping mode), each file is compressed in blocks that are immediately added to the final zip file. If checked (alternate zipping mode), each file is compressed in blocks in a temporary file. When the whole file is compressed in the temporary file, it is added to the final zip file.

This option has effect only when backing up to internal hard drives and LAN. In all other cases this option is ignored. When backing up to LAN drives, it is recommended to check this option and uncheck Always use temporary folder to create zip files option. When backing up to internal hard drives, it is recommended to uncheck both options. By default this option is not checked.