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Exceeding SD Card Capacity
Does the machine issue a warning when the SD card capacity is exceeded or is about to be exceeded? Or perhaps it erases the earliest file in order to record the current one. Anyone know?

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It is my undersanding that the flow generator firmware maintains a max number of days (365) on the card and dumps the old ones as needed. The contents never approach the maximum capacity of the SD card.
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OK thanks. I can check that since I've been on therapy for over a year.
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Can't say for the Resmed, but the Respironics card can take years of data. I have started new ones only because it loads faster into the software reporting programs with less data, so I usually swap out after 2 years.
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