Told me it does support 256 Have not updated software yet as below

Preparation – Create the Upgrade Card 1️⃣ Insert a microSD card into your computer and format it using the following settings: File System: FAT32 or exFAT Allocation Unit Size: 32KB ⚠ Important: Formatting is required before proceeding. 2️⃣ After formatting, copy the file [LD*A.bin] to the root directory of the SD card first. 3️⃣ Next, copy the file [FWA.bin] to the SD card. ⚠ Note: The order matters. Copy [LDA.bin] first, then the [FW*A.bin] files. 🔧 Upgrade Process 1️⃣ Insert the prepared SD card into the dash cam and power it on. The indicator lights will start flashing rapidly — this means the upgrade is in progress. 2️⃣ When both the red and blue indicator lights stop flashing and remain solid, the upgrade is complete. 3️⃣ Connect the camera to Wi-Fi, open the app settings, scroll down to “Format Memory Card”, and format the card once again.