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HDS Gen2 Touch overview | HDS Gen2 Touch Installation Manual
SD card slot
Used for optional Navionics or InsightHD chart data, software
updates, transfer of user data and system backup.
The card reader door is opened by lightly pressing and sliding the
door to the left, then pulling forward from the left side.
The card reader door should always be shut immediately after
inserting or removing a card, in order to prevent possible water
ingress.
¼ Note: The HDS-9 and 12 Displays have two card readers, the HDS-7
has one.