Bob & Steve. Thanx for the info.
I just completed a TOTAL upgrade of my 650 using the link provided above. As another mentioned, it wasnt as intuitive as it could have been. It took me 3 to 4 hours to get to where I had 2 SD cards ready for uploading. The actual uploading in the plane was half an hour. Totally current - until July 19th.
Just a point of interest, I had emailed Garmin support at the same time I posted my initial question here on VAF, asking if I could do the upgrade or did I need to take it in. Their response was I needed to take it to an authorized service center. So I called one nearby. They were to call back. When no response I decided to dig into the guidance provided above. And it worked.
RV 7A RV #9700
N325KS the Flying “K”
Built in SoCal KCCB, now @ KPXE
270+ Hours & 5x cross the USA
2018 OSH - yes