zpaq: zpaq (journaling, incremental, deduplicating archiver)
zpaq:
zpaq: "Journaling" means that when you update a file or directory, both the
zpaq: old and new versions are saved. You can extract from the archive as it
zpaq: existed at any time in the past.
zpaq: "Incremental" means that when you back up your entire hard drive, only
zpaq: those files whose last-modified date has changed since the previous
zpaq: backup are added.
zpaq: "Deduplicating" means that identical files or fragments are stored
zpaq: only once to save time and space.
zpaq: