To download ResMed CPAP data from an AirSense 10 or 11, put the machine in standby, remove the SD card from the side slot, copy the whole card (including the DATALOG folder) to your computer with a card reader, then open the folder in a browser tool such as AirwayLab, no install needed.
Does it matter? Only if you want more than the nightly score in the app. The SD card holds the full breath-by-breath record.
Want the short version? See the AirSense 10 one-page upload checklist or the AirSense 11 one-page upload checklist.
Medical disclaimer: This article is for informational purposes only. AirwayLab is not a medical device, and nothing here constitutes a diagnosis or treatment recommendation. Always discuss your therapy data and any concerns with a qualified sleep specialist or clinician.
What Your ResMed Device Actually Records
ResMed devices record two distinct layers of data simultaneously. One goes to myAir. The other stays on the SD card.
Summary data (myAir / cloud)
- Usage hours
- Headline AHI (apnea-hypopnea index)
- Mask fit / leak rate score
- myAir daily “score”
Detailed data (SD card / EDF files)
- Continuous flow waveform (breath-by-breath)
- Pressure changes throughout the night
- Detailed leak rate over time
- Individual event timestamps (apneas, hypopneas)
- SpO₂ and heart rate (if oximetry sensor present)
The EDF files on the SD card are the same files that OSCAR, SleepHQ, and AirwayLab use for detailed analysis. myAir only shows you the summary layer.
What myAir Shows — and What It Doesn't
myAir shows
- Usage duration each session
- Nightly AHI score
- Mask fit percentage
- Overall daily score
myAir does not show
- Raw flow waveform data
- Flow limitation percentage or patterns
- RERA-type breathing events
- Access to your EDF files
myAir is a convenient compliance monitoring tool. Detailed analysis of breathing patterns — including flow limitation, breathing regularity, and event timing — requires access to the SD card data. Your clinician can help interpret the full picture from the detailed data.
AirSense 10: How to Download Your Data
Power off your AirSense 10. Unplug the machine from power.
Locate the SD card slot on the left side of the machine (when facing it from the front). There is a small cover protecting the slot.
Remove the SD card. Press the card inward gently until it clicks, then let it spring out. Pull it free.
Insert the SD card into your computer. Use a built-in SD slot or a USB SD card reader. The card appears as a removable drive.
Open the DATALOG folder on the card. This folder contains your session data in EDF format, organised by date.
Tip
Removing the SD card does not erase your data or reset your machine settings. Your AirSense 10 stores therapy settings internally. It is safe to remove and reinsert the card at any time when the machine is powered off.
AirSense 11: How to Download Your Data
Power off your AirSense 11. Unplug the machine from power.
Find the SD card slot on the left side of the machine, behind a small cover panel — the same location as the AirSense 10. The AirSense 11 uses a standard SD card, not a micro SD card.
Remove the card. Press gently until it clicks and springs out, then pull it free.
Insert into your computer. Use a built-in SD slot or a USB SD card reader. The card appears as a removable drive.
Open the DATALOG folder. The folder structure is the same as the AirSense 10: date-organised subfolders containing EDF session files.
AirSense 11 note
Some AirSense 11 units ship without a pre-installed SD card. If your machine has no card, insert any Class 10 standard SD card (8 GB or larger, formatted FAT32). The device will begin recording detailed session data from the next therapy session.
What's on the SD Card
When you open the SD card on your computer, you will see a folder structure like this:
SD Card/ ├── DATALOG/ │ ├── 20260101/ │ │ ├── BRP.edf ← continuous flow waveform │ │ ├── EVE.edf ← event log (apneas, hypopneas) │ │ └── SAD.edf ← SpO₂/HR data (if sensor present) │ ├── 20260102/ │ └── ... ├── SETTINGS/ ├── Identification.tgt ← device model info └── STR.edf ← machine settings
BRP.edf
The most important file. BRP stands for Breathing. This EDF file contains the continuous flow waveform — the breath-by-breath airflow signal recorded at 25 Hz. It is what tools like AirwayLab use to detect flow limitation patterns, RERA-type events, and breathing regularity metrics.
EVE.edf
The event log: timestamped apnea, hypopnea, and other event records from the device's own detection algorithms. This is what your AHI is calculated from.
SAD.edf
SpO₂ and heart rate data from an attached oximeter. Present only if you are using a compatible ResMed oximeter. Not all users will have this file.
Beyond myAir: Tools That Show More
Once you have access to your SD card data, AirwayLab opens it for detailed analysis right in your browser:
AirwayLab
A browser-based analysis tool. Drag your DATALOG folder into AirwayLab and your data loads immediately — no installation, no account, and no data upload required. All processing runs in your browser. AirwayLab adds four analysis engines on top of basic CPAP charts: the Glasgow Index (breath shape scoring), WAT (breathing regularity and periodicity), NED (flow limitation and estimated RERA patterns), and an oximetry pipeline with 17 metrics.
See how it compares: Analysing Your ResMed SD Card in the Browser
AirwayLab reads the SD card from the same machine myAir syncs with, scores each night for flow limitation and effort patterns, and opens the waveform behind any flag in your browser — the breath-by-breath detail a compliance summary leaves out. myAir covers daily compliance tracking and the sync to your sleep clinic. Your clinician can help interpret the findings.
Frequently Asked Questions
Where is the SD card on an AirSense 11?
Behind the small door on the left side of the machine.
Can I download ResMed data without the SD card?
The myAir app shows summaries only, the full record is on the SD card.
Will removing the SD card lose data?
No, but put it back before the next night so recording continues.
Related Articles
How to Export and Understand Your CPAP Data — a broader guide covering all major CPAP brands, not just ResMed.
Analysing Your ResMed SD Card in the Browser — what AirwayLab extracts from your DATALOG files and how.
Understanding Flow Limitation in CPAP Data — the breathing pattern your flow waveform reveals beyond AHI.
OSCAR Alternative: Browser-Based CPAP Analysis — comparing OSCAR and AirwayLab for ResMed data analysis.
Device guides hub — find the download steps for your specific CPAP model.
ResMed AirSense 11 SD Card: Where It Is and How to Read the Data — a closer look at the AirSense 11's card slot and file layout.
How to Download CPAP Data from an SD Card — the same steps for the other supported machines.
Analyse your data — open your DATALOG folder directly in AirwayLab.
Medical disclaimer
AirwayLab is an educational tool, not a medical device. The analysis provided is based on published research methodologies applied to your PAP device's flow data, but it is not a substitute for polysomnography or clinical evaluation. Always discuss your therapy data with your sleep physician. The metrics described here are for educational purposes and to support informed conversations with your clinician.
Check your own nights
Upload your DATALOG folder to AirwayLab for instant browser-based analysis. No installation, no account, and your data never leaves your device.