A Standard SD card should fit a Lowrance HDS 2 unit
~ Captain Paul's response to: ~ Kenneth ~
Everything that I read as well as the Lowrance web site (http://www.lowrance.com/Products/Marine/HDS-Gen2/HDS-7-Gen2/Specifications/ ) in their Specifications on the HDS 7 indicates that
the HDS Gen2 units are Memory card capable and has ONE SD/MMC memory card slot.
If you purchased a standard SD card it should fit in the card slot of the unit. If you purchased the Nautic Insight on a microSD card, you can obtain a small converter device that accepts the MicroSD chip and converts it to a standard SD format.
Your SD card SHOULD fit in the HDS Gen 2 unit.
If this does not correct the problem, contact the Lowrance support section at 1-800-324-1356 and ask them for assistance.
Please let me know how you make out.