What's the easiest way to update TZT3 charts?

[crck0848]

What is the best way to update charts on my TZT16F chartplotters?

I wish Furuno would post a FAQ on this topic. All I can figure out is this time-consuming process:
1) Stumble around on mytimezero.com and find the dozens of charts I want to update, which is almost impossible because of the convoluted structure for naming chart files.
2) Download zip files manually, one at a time. (Today I spent about 10 hours doing this.)
3) Unzip them and copy them to the SD cards.
4) Hope I didn't miss anything, because there's no way to check completeness.

If there's a better way, I hope somebody will educate me. I love everything about my Furuno system, with this one exception. I should be able to press a button that says "update charts" and come back when it's done.

 

[crck0848]

Follow-up questions:
Can I just replace my version 23.3 SD cards with new ones that include all current charts?
And does the TZT16F support any 512GB SD cards? The manual lists cards up to 256GB. I had to delete files to make room for Bahamas hi-res photos.

Thanks!

 

[jp498]

You only need to download the area where you use the boat, not the whole planet. In the US, I would at mytimezero, go to vector, noaa, click on the east coast, and it would show me one file to download for the whole east coast.

 

[crck0848]

Our annual cruising area (Great Loop) covers a lot of territory. Atlantic coast, Canada, inland rivers, Gulf, Bahamas. I just bought the Bahamas chart package, and it included around 20 gigabytes of vector charts and SAT photos. My 256GB card is maxed out. I had to dig around and find stuff to delete (SAT images from the west coast, which I might not need until later).