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What does the presence of a file named denote?

Is it safe to delete?

I find about a dozen of these scattered across my local hard disks, not the TimeMachine volumes...

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up vote 0 down vote accepted

It means that the folder it is in is supported as a target for Time Machine backups. They are very tiny files and wouldn’t be a space hog. But if you are seeing them, you are probably seeing other hidden files as well. But if you are using Time Machine for backup, don’t delete these files or the folder/disk wouldn't be able to be used as a Time Machine backup target.

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Many folders without the file are still backed up by Time Machine. – ohho Jul 22 '13 at 10:27
@ohho I edited my answer to make it clearer. – duci9y Jul 22 '13 at 15:33

Yeah, it just denotes that the particular entry is supported for time machine backup.

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IOW, it's "safe to delete"? – ephsmith Aug 11 '12 at 15:59
It's safe to delete from the internal hard drive. – patrix Aug 11 '12 at 18:44

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