MEMORY CARD GUIDE · OCTOBER 18, 2026
Choose a card for your N4 Pro S.
Start with an endurance card and the exact model number. Capacity, speed labels and repeated-recording durability answer different questions.
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CARD TO COMPARE
SanDisk MAX Endurance 256GB.
SDSQQVR-256G-GN6IA · Class 10 / U3 / V30
This is our lead candidate based on SanDisk’s specifications and Vantrue’s endurance-family guidance. A2 is not specified in the SanDisk documentation checked, so it is not a confirmed match for every recommendation in Vantrue’s troubleshooting advice.
Read the speed labels together.
| Check | What the documents say | Buying implication |
|---|---|---|
| Camera specification | 32GB–1TB microSD; U3 and Class 10. | Check capacity and speed, not just “4K” on the package. |
| Interruption troubleshooting | Vantrue recommends U3/A2 for interrupted or jammed recording. | Do not read this as “U3 or A2,” or assume A2 is irrelevant. |
| This SanDisk card | Class 10, U3 and V30; no A2 claim established. | It matches the baseline speed labels, with the A2 qualification above. |
U3 and V30 are video-related speed classifications. A2 is a separate application-performance class; one does not establish the other. Sources: Vantrue manual, printed pages 41 and 43, SanDisk specifications and SD Association.
Vantrue’s FAQ recommends specific endurance-card families, including SanDisk High/Max Endurance. That is family-level guidance, not exact-SKU testing or certification. Follow the model’s instructions rather than treating every card from those brands as interchangeable.
Capacity is space. Endurance is rewriting.
A larger card holds more footage under the same recording conditions. The camera’s 1TB ceiling does not approve every 1TB card. The checked MAX Endurance lineup runs from 32GB to 256GB; a larger card would need its own specification check.
SanDisk rates the 256GB version for up to 120,000 hours of Full HD recording and rewriting under its stated conditions, with fewer total hours for 4K. This is a cumulative endurance claim, not footage stored at once, guaranteed service life or an N4 Pro S retention promise.
A short commute and long parked-recording periods also create different workloads. Choose capacity around the footage you need to retrieve, and keep important recordings elsewhere rather than relying on a bigger card as your only backup.
Source: SanDisk MAX Endurance datasheet and endurance qualifications.
How much recording time might fit?
These are illustrative calculations, not measured N4 Pro S bitrates. The bitrate column is the combined total for all recording channels, including audio and recording overhead.
| Combined bitrate | 128GB | 256GB |
|---|---|---|
| 50 Mbps | 5.12 hours | 10.24 hours |
| 75 Mbps | 3.41 hours | 6.83 hours |
| 100 Mbps | 2.56 hours | 5.12 hours |
Settings, variable bitrate, protected files, automatic deletion and parking modes change the result. Recording hours are not calendar days of guaranteed retention. Sum the channels’ file sizes for the same elapsed period; do not add their playback durations together.
How the estimates are calculated
Hours = capacity in GB × 1,000,000,000 × 0.90 × 8 ÷ (combined Mbps × 1,000,000 × 3,600). GB is decimal; the 90% allowance is an explicit planning assumption, not a measurement of available camera storage.
For a more relevant estimate, divide the total bytes in your own representative recording period by its elapsed seconds, then multiply by eight. Allow for changing scenes and settings; this still cannot promise future retention.
Back up before formatting.
- Copy important recordings from every relevant channel to separate storage. Open the copies to check they are readable.
- Turn the camera off before removing or inserting the card.
- Use the camera’s formatting instructions. Formatting erases the card’s data, including files you intended to keep.
Vantrue’s FAQ suggests formatting every 3–4 weeks for regular use and 2–3 weeks for heavy use; the manual advises at least monthly. Back up first each time. A protected clip on the same card is not a separate backup.
If important footage is on an unreadable card, avoid formatting it as your first response. If recordings stutter, review Vantrue’s card advice and the correct firmware support page. Do not assume buying this card alone will fix the problem.
Return to the installation checklist →Sources and selection limits
Reviewed October 18, 2026. This guide compares manufacturer documentation; it does not certify an individual card or rank hands-on performance. Confirm the exact model and current instructions before ordering.