What Does Backup Bit Mean?
A backup bit is a single unit of binary data that shows a value of either one or zero. Some processes use the backup bit to determine whether a file has been backed up or modified.
Techopedia Explains Backup Bit
Essentially, the single backup bit stored in the system is a piece of metadata that allows programs to flag whether the file has been backed up. However, on some conventional operating systems, outside features like timestamps track the modification or backup of files. In these cases, a backup bit or archive bit may not be relevant.
