1) Check SD Card Specifications (Most Common Cause)

• Capacity: ≤ 256 GB supported. 512 GB (and larger) are not supported.
• Speed class: Use U3 / A2 / V30 (high-endurance video cards preferred).
• Guide: How to Choose the Right Memory Card for Your Motorcycle Dash Cam (pick reputable brands; avoid “too-cheap” high-capacity cards).

2) Verify SD Card Installation

• Power off the display.
• Remove the card, then reinsert firmly until it clicks.
• Power on and check if the message clears.

3) Format the Card (Recommended Order)

On the CHIGEE Display (preferred):
Settings → Storage/SD Card → Format.

• Use the SD Association Memory Card Formatter (Quick Format; if needed, Overwrite Format).
• Reinsert into the CHIGEE Display and format again on the device.

If the card reports odd capacity or can’t complete an overwrite format, it’s likely defective/counterfeit—replace it.

4) Try a Factory Reset (if errors persist)

Chigee Display Settings → Reset → confirm.
Then repeat the format steps above with a known-good ≤256 GB U3/A2/V30 card.

Extra Checks

• Adapter lock: If using a microSD→SD adapter on PC, ensure the lock switch isn’t set.
• File I/O test: Copy a 2–4 GB video to the card on a PC and play it back; corruption = bad card.
• Slot/contacts: Inspect for debris or bent pins (no metal tools).
• Avoid exotic setups: Single partition, standard filesystem only; let the device do the final format.

Known Unsupported / Not Recommended

• 512 GB+ cards
• Low-speed cards (Class 10/U1 or unmarked)
• Counterfeit/remarked media

Still stuck?

If these steps don’t resolve the issue, please contact CHIGEE Support with:

• Your device model/firmware
• Card brand/model/capacity
• A photo of the error screen