indicates its version number, that is, the first version of the backup file will be given the file
extension "v00", the second "v01", and so on. This number will increase each time a new version
of file is backed up. When all twenty versions are used up, you will see a file extension of "v20"
and the file with the extension "v00" will be deleted. Following this numbering scheme, the file
extension will increment and accumulate until "v99" and then reinitialized to "v00" to begin a new
cycle.
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