Thanks guys for your help. I'm a complete newbie to CPAP, so will be asking a few questions probably
Glad I stumbled across this most helpful forum

I just ordered this one (hopefully will work OK)
http://www.ebay.com.au/itm/Premium-USB- ... Sw7s5XhcOF

I'd like to get an SD card reader for my Resmed Airsense 10 Autoset. Do I need a Resmed brand reader like this? https://www.cpapaustralia.com.au/AU/en_AU/CPAP-Accessories/Data-Management/ResMed-SD-Card-Reader/p/36931 or would a cheaper one like this suffice? http://www.ebay.com.au/itm/Premium-USB-3-...

I believe the Resmed Airsense 10 Autoset is compatible with Sleepyhead software. Is that correct?