An SD card wears out by program/erase (P/E) cycles, and a camera recording continuously burns through them fast. Axis surveillance cards use TLC and QLC NAND with a deliberately low write amplification factor, so far fewer P/E cycles are consumed for the same amount of recorded video. Axis field data across billions of operating hours shows the vast majority of cards still working after five years — 97.9% of 128 GB cards and 99.8% of 256 GB cards — and roughly 85–95% still functional at ten years. A consumer card in the same camera typically fails long before that, usually without warning.
Health monitoring built in
Axis health monitoring tracks the wear on each card from actual usage data and notifies you months in advance when a replacement is needed — so you swap the card on a scheduled visit, not after you have lost evidence.
Encryption for stolen cards
Axis cameras can encrypt the card in the device: AES-CBC 128-bit from AXIS OS 5.80.1, AES-CBC 256-bit from AXIS OS 8.40.1, and AES-XTS-Plain64 (256-bit) on newer devices from AXIS OS 8.30.1. Pull the card out and the footage is unreadable.
Primary or failover storage
Record high-resolution video straight to the card as primary storage with no NVR on site, or run it as failover so the VMS can automatically backfill any footage missed during a network outage.
Long retention, real numbers
A 128 GB card typically delivers anywhere from 20 to 215+ days of retention depending on resolution, frame rate and event-based recording settings. Larger cards extend that considerably.
Which capacity should I choose?It depends on resolution, bitrate and how many days you need to keep. As a guide, a 128 GB card typically gives 20 to 215+ days depending on configuration; 4K cameras or long retention requirements point to 512 GB or 1 TB.
Can I just use a normal microSD card?You can, but consumer cards are not built for continuous writing and often fail within months. Axis surveillance cards use low write amplification and industrial NAND so the same card generally lasts the life of the camera.
How long will the card actually last?Axis simulations put a 128 GB card at around 10 years on a 2 MP 2.5 Mb/s stream and a 1 TB card at around 53 years. Real field data shows 97.9% of 128 GB cards and 99.8% of 256 GB cards still working after five years.
Which Axis devices are compatible?All Axis products with SD card support. The card is a microSDXC with an SD adapter supplied, so it also reads in a standard SD slot for offloading footage.
Can the footage be encrypted?Yes. Axis cameras can encrypt the card in the device — AES-CBC 128-bit from AXIS OS 5.80.1, AES-CBC 256-bit from AXIS OS 8.40.1 and AES-XTS-Plain64 256-bit on newer devices — so a removed card cannot be read.
What is card health monitoring?A data-driven service in AXIS OS that tracks wear from actual card usage and notifies you months in advance when the card should be replaced, so you can schedule the swap rather than discover a failure after an incident.
Do I still need an NVR?Not necessarily. Edge storage can act as the primary recording location, or as failover storage alongside a VMS so missed footage is automatically backfilled once the network returns.
What file system should I use?Axis recommends ext4. It is a journaling file system, so it recovers faster and is less prone to corruption after a power outage — important on vehicles or sites with unreliable power.
What warranty applies in Australia?Axis provides a 5-year warranty on surveillance cards with free support, repair and replacement of defective units. CCTV Guru supplies genuine Australian stock and handles the warranty locally.
