Hello cheekoo,
Congrats on your new machine, but to answer your question...you have to use a separate SD card for each machine. Each Cpap has their own serial number and records the Serial Number to the SD card.
I think if you insert the S9 SD card into the S10, you will lose the data from the S9.
I’m not sure what the MyAir site saves or stores, but if your concerned about preserving your data, simply download the
OSCAR Software. The directions are easy to follow. After setting up your profile, insert the card from the S9 cpap into your computer and download your data into the
OSCAR program.
Be sure to lock your SD card when inserting it in your computer and unlock it when inserting back into the Cpap.
After you have a few days of data from the S10, do the same. The program should seamlessly transmit the S10 data, while preserving the S9 data.
Or you can set up separate profiles for the S9 and one for the S10 to keep the data separate.