One of the most critical components for the camera and security system of a BYD vehicle is the memory card. Despite appearing small and simple, choosing a quality memory card is the difference between successfully saving vital recordings and irreversible data loss.
Why Do You Need an External Memory Card?
BYD Internal Storage Limitations
The BYD vehicle system comes with limited internal storage that is insufficient for continuous recordings:
- Low Capacity: Internal storage is very small and fills up quickly
- Automatic Overwrite: Old recordings are automatically deleted when memory fills
- Cannot Expand: It's not possible to increase internal storage
- Risk of Data Loss: Important events may be deleted before you can save them
External Memory Card Benefits
- Significantly larger storage capacity, 128GB, 256GB or even 512GB
- Save recordings for extended periods
- Ability to remove the card and view recordings on computer
- Protected backup of all important events
The Danger of Counterfeit Cards from AliExpress
Why Are AliExpress Cards Problematic?
Sites like AliExpress are full of counterfeit memory cards that look like originals but cause serious damage:
- Fake Capacity: Card appearing as 128GB actually holds only 8GB or 16GB
- Slow Speed: Cannot write recordings at required speed
- Frequent Failures: Break quickly without warning
- Lost Recordings: Files saved corrupted or deleted completely
- System Damage: May cause malfunctions in camera system
Common Problem Example
A driver bought a cheap 256GB card from AliExpress. After two weeks, the card filled "completely". When trying to view recordings, discovered only the last 20 recordings were saved and the rest deleted. Turns out the real capacity was only 16GB, and the card overwrote old recordings without notice.
Recommendation: Original SanDisk Cards
Why SanDisk?
SanDisk is one of the leading and most reliable companies in memory cards:
- Guaranteed Quality: Original cards with real performance
- Long Warranty: Manufacturer warranty of 5-10 years
- High Durability: Resistant to heat, cold, water and shocks
- Technical Support: Professional customer service
- Availability: Easy to find in local stores
Recommended Series
- SanDisk Extreme: High speed, ideal for video recording
- SanDisk Extreme PRO: Maximum performance for professional users
- SanDisk High Endurance: Specially designed for security cameras
Understanding File Write Speed
Why Is Write Speed Important?
BYD's camera system records high quality video from 4 cameras simultaneously. This requires high write speed:
Speed Types
- Class 10: Minimum 10MB/s, sufficient for basic recording
- UHS-I U1: Minimum 10MB/s, good for regular recording
- UHS-I U3: Minimum 30MB/s, recommended for 4K recording
- V30: Minimum 30MB/s, ideal for car cameras
What Happens When Speed Is Too Low?
- Missing frames in recording
- Interruptions in video
- Recordings not saved at all
- System error messages
Recommended Capacity
How Much Memory Do You Really Need?
Rough calculation of storage consumption for camera system:
- 32GB: About 4-6 hours recording, not recommended
- 64GB: About 8-12 hours recording, acceptable minimum
- 128GB: About 16-24 hours recording, most recommended
- 256GB: About 32-48 hours recording, ideal
Recommendation
For daily use, a 128GB card is the optimal choice, provides enough space for many days of recordings without being too expensive.
How to Identify an Original Card?
Signs of Original Card
- Original Packaging: Quality packaging with hologram
- Serial Number: Each card with unique number
- Quality Printing: Clear text, not blurred
- Correct Weight: Counterfeit cards sometimes lighter
- Purchase from Known Store: Large chains like major retailers
How to Check After Purchase?
- Use H2testw software (Windows) or F3 (Mac) to check real capacity
- Check read and write speed
- Verify card recognized at correct size on computer
- Upload large files and check they save properly
Installation and Maintenance
Correct Installation
- Format card to FAT32 or exFAT
- Insert card into vehicle system according to instructions
- Allow system to detect and initialize card
- Perform test recording and check file is saved
Regular Maintenance
- Regular Backup: Copy important recordings to computer
- Periodic Cleaning: Delete old unnecessary recordings
- Occasional Format: Full format of card every 3-6 months
- Integrity Check: Check recordings are saving properly
What to Do If Card Fails?
Warning Signs
- System error messages
- Recordings not saving
- Card not recognized
- Corrupted files
Immediate Actions
- Stop using card immediately
- Try to recover files with recovery software
- Contact warranty if card is original
- Replace with new quality card
Cost Comparison
Worthwhile Investment
| Counterfeit Card from AliExpress 128GB: | $8-13 |
| Original SanDisk Card 128GB: | $20-40 |
The difference of $12-27 is small compared to the risk of losing critical recordings of accidents, break ins or vandalism. A quality card is cheap insurance for information that could save thousands in insurance claims or legal disputes.
Summary
Choosing a quality memory card for your BYD vehicle is one of the most important and smart investments. The vehicle's limited internal storage requires a reliable external solution, and counterfeit cards from AliExpress can cause irreversible loss of critical recordings.
Original SanDisk cards, despite being more expensive, provide the reliability, speed and durability required for BYD's advanced camera system. The small investment in a quality card is your best insurance for protecting the vehicle, family and property.
Remember: a memory card is not just a technical component, it's your evidence keeper in emergencies. Don't compromise on quality.