Review on 🗺️ Humminbird LakeMaster Great Lakes Edition GPS Lake Maps - Version 4, Digital Micro SD Card by Michael Luna

Was disappointed in the lack of instructions on how to upgrade the Helix 7 I was planning to use it on. I had 3 technical calls and a direct message with support. First I had to update my version from 1.64 to 2.30 on the micro SD card. Bought the 128mg kit from Costco, downloaded the update from the website and the unit wouldn't read (downloading that micro sd card is archaic). When they called tech support they said they only recognize 32mg cards that ran on staples and got a 32mg card that had downloaded an update and still wouldn't do an update. Finally downloaded but on startup it writes the wrong version. Called tech support a third time (note I didn't contact tech support on any call, after a long wait I was given an option to call back which I preferred but didn't have to keep in touch that much time). So the tech says yes, invalid means it's updated to 2.30. I also stated that no new software will be downloaded to the device, she stated that you have to leave the micro sd card to use it unless I missed it, I've never had this in the seen instructions. So it's constantly dredging at a lake I visit frequently and the depths are deep in many areas and this isn't updated. You need to get zero lines (which I started with but only came on SD card and Helix 7 only accepts micro sd Slightly disappointing purchase so hope this helps others make a choice.