Axis Camera Companion Storage Question

Hello guys
I have pretty easy question, I am sure a lot of you have used Axis camera companion before. Using ACC to setup storage, if I leave it at MAX does it overwrite the oldest recordings like any normal NVR/DVR? Or do I have to specifiy how long to keep recordings?
Manual is not clear to me. This is what it says:
Days to keep recordings- Enter the number of days to keep recordings, or select Max to keep recordings until the storage device is full. Recordings older than the specified number of days will be removed.
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