Archive name and parameters dialog: backup options
All files and folders on the target disk will be erased before starting the archiving operation. If you create volumes, erasing will be performed before creating of each volume, giving you the chance to archive to non-empty removable disks. But you must be sure that disks do not contain any useful information. The option applies only to removable media, hard disk cannot be erased using this function.
Only those files which have attribute "Archive" set, will be added. Folders are added regardless of their attributes. This option is designed for backup purposes.
Clear attribute "Archive" on successfully compressed files. Folder attributes are not changed. This option is designed for backup purposes.
Allows to process files opened by other applications for writing. It helps if an application allowed read access to file, but if all types of file access are prohibited, file open operation still will fail.
This option could be dangerous, because it allows a file to be archived, while that file may be in the process of being modified by an other application. Use with great care.
Appends the current date string to an archive name when creating an archive. Useful for daily backups. The date string is formatted by the specified mask. Read description of switch -ag for details.
Forces WinRAR to keep previous file versions when updating files in the already existing archive. Old versions are renamed to 'filename;n', where 'n' is the version number. Supported only by RAR archives.
When using this option, it is recommended to avoid names in 'filename;n' format among files to add. Such names can lead to duplicate entries if old version with same name either is present in archive or will be created later.