I put the card into laptop and verified there was no data for last night (with write protect on). Tonight at 10p I get ready for the night, put the card back into CPAP with write protect OFF, and the screen says "Re-writing data to SD card" !! With a button press required for yes or no.
Huh? &*%^^ I have never seen this before, and I don't want the thing re-writing the card because I know the machine holds a lot less data than is on the card, right? When card was in the computer all looked fine ( although I observe there are only five big files, which I assume are the Flow data--I thought it kept a week?)
I don't know whether to tell it yes or nno to rewrite.