Security and smart camera owners often face a nasty situation where the device stops recording video or does not see the installed drive. The error "SD card not found" or "No access to SD card" can appear at the wrong time, leaving the user without an important video recording, the reasons for this can be many, from banal bad contact to incompatibility of the file system with the firmware Mi Home.
This is a problem that is relevant for both budget models and flagship solutions in the Mijia line. Often users sin on the device itself, although in 80% of cases it is a software failure or incorrect preparation of the memory card. In this article, we will discuss all possible reasons for failure and provide step-by-step instructions for restoring the functionality of your video surveillance system.
Don't panic and take the camera to the service center, and most of the manipulations you can do yourself using only your smartphone and computer, and the right diagnostics will save you time and money by returning the full functionality of the recording to the cloud or locally.
Primary Diagnostics and Physical Connection Check
The first thing to do when you find an error is to check the physical condition of the memory card and the slot. Often the problem lies in the oxidation of the contacts or insufficient depth of immersion in the connector. Full contact between the reader and the drive is critical for stable operation.
Carefully remove the memory card, before turning off the power to the camera to avoid short circuit. Carefully inspect the golden contacts on the end of the card: they should be free of oxides, grease or dust. If you notice contamination, wipe them with a soft dry cloth or eraser, but do not use liquids.
⚠️ Warning: Never insert or remove a memory card while the camera is connected to the power grid, which can cause permanent damage to the power controller or the combustion of the power controller itself. SD-map.
After cleaning, try inserting the card back before the characteristic click. Make sure it doesn't hang around and sits tight. If the slot is loose, you can try gently pressing it (with the power off), but it's better not to risk it and go straight to check on another device.
☑️ Diagnostics of physical connection
Verification of compatibility and memory card requirements
Xiaomi cameras, like any other smart appliance, have strict requirements for the drives used. A standard office flash drive or low-speed memory card may not work with high-definition video streaming. The main parameter here is the speed class and file system type.
Most Xiaomi Mi Home cameras require a microSDHC or microSDXC card with a capacity of 8 to 64 GB (some new models support up to 128 GB and 256 GB).However, even if the volume is formally suitable, the card can be rejected by the system if its write speed is below 10 Mb/s (Class 10).
Also matters is the drive brand.Cameras often work better with maps from proven manufacturers like SanDisk, Kingston or Samsung.Cash Chinese counterparts can have real capacity less than claimed, leading to cyclical overwrite and access errors.
| Parameter | Minimum requirement | Recommended value | Reason for refusal |
|---|---|---|---|
| Memory capacity | 8GB | 32Gb | Not enough space for a buffer |
| Class speed | Class 6 | Class 10 / U1 | Delayed video recording |
| File system | FAT32 | FAT32 | Incompatibility of SOE |
| Brand | Anybody. | SanDisk/Kingston | Unstable controller |
If your memory card doesn't meet these requirements, no software settings will help, in which case the only solution is to buy a specialized memory card marked "High Endurance" for DVRs and surveillance cameras.
Formatting the drive through the Mi Home application
The most common and often the only necessary step to fix the error is to format the map using the app itself. Xiaomi cameras use a specific folder structure for cyclic recording that cannot be recreated manually on a computer.
Open the Mi Home app on your smartphone and go to the control interface of your camera. Click on the three dots in the upper right corner of the screen to open the settings menu. Find the "Storage settings" or "Memory management" section.
In this menu, you'll see the status of the memory card. If it's determined but it's not working, it'll have a Format or Format button. Click on it and confirm the action. It takes 10 to 30 seconds for the camera to overwrite the service files.
⚠️ Note: Formatting will completely destroy all the data on the memory card, and if it has important records that you didn't transfer to the computer, it will be extremely difficult to restore them after this procedure.
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If the formatting button in the app is inactive (gray), try turning off the camera with the power button first, wait 10 seconds and turn it on again, then go to the settings.
After successful formatting, the camera usually emits an audible signal or a voice message "SD card detected." The status in the application should change to "Normal" or "Recording is coming." If the error persists, move to deeper methods of solving.
Using a computer for deep formatting
In cases where the camera's built-in tool fails, "clean" formatting is required using a PC. Standard Windows formatting often creates a partition table that the camera can't read correctly. We'll need the SD Memory Card Formatter utility from the SD Association.
Connect the memory card to your computer via a card reader. Download and install the official formatting program. Select your card from the disk list (make sure you haven't selected the system drive!) and press the "Format" button. Select the "Overwrite format" format type for a full reset.
The following steps in SD Formatter:
1. Select the drive (Drive)
2. Select type (Type): Overwrite format)
3.Push Format.
4.Pending the message "Format Complete"Once the card is finished, the card will have a FAT32 file system (for cards up to 32 GB) or exFAT (for cards up to 32 GB). However, the camera may require FAT32. If you have a 64 GB card and the camera can't see it, you may need to force it to format it into FAT32 using tools like GUIFormat.
Why can't the camera see exFAT?
Resetting camera settings and reconnecting
Sometimes the problem isn't the map, but the software failure of the camera itself or the app's cache, in which case a complete factory reset helps, and this action will bring all the settings back to their original state, including the Wi-Fi settings.
Find the Reset button on the camera body, usually a small hole where you press a paper clip, or a separate button, press it for 5-10 seconds until the camera reports the reset, and then the device will reset.
After the reboot, you will have to re-add the camera to the Mi Home app, scanning it. QR-This process takes a few minutes, but often resolves the software conflicts of the read driver.
- 🔄 Reset clears temporary files and system error cache.
- 📡 Reconnecting Updates Network Communication Protocols.
- ⚙️ Returns standard bitrate settings and resolutions, which reduces the load on the card.
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Hard Reset is a radical, but often the only way to fix camera controller software errors when other methods are powerless.
Checking the card on another device
To make sure the diagnosis is complete, you need to rule out the camera itself, insert the suspicious memory card into another gadget: a smartphone, tablet, DVR or another Xiaomi camera. If the other device also does not see the card or writes a formatting error, the problem is guaranteed in the drive.
You can also check the health of the card on a computer, and use tools like H2testw or CrystalDiskInfo, which will test the surface and show the presence of broken sectors, and if the program shows read/write errors, the card needs to be disposed of.
If the other device is perfectly working and the camera ignores it, it may be the mechanical damage to the contacts inside the camera slot, in which case only professional repair or use of external equipment will help. USB-drive (if the camera model supports this option through the OTG).