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1. Program upgrade steps: Copy the upgrade file to the root directory of the U disk. Use a U disk of less than 32G, U disk format: FAT32. Then use the USB to TYPE-C adapter to connect YCSR1 to upgrade.
If the upgrade file is recognized, an upgrade pop-up window will appear.
2. The smaller the storage, the greater possibility of U disk recognition. If the recognition fails, it is recommended to use a U disk with a smaller storage or of other brands. For example: SanDisk 16GB.
