I tried posting the link but it said it needed moderators approval??
That's probably because you don't have very many posts here yet.
From Amazon review of the 650-
Update #1: I was able to install a 64GB SanDisk Extreme Micro SDXC Memory card. However, using the SD Card Formatter program as described...
Thanks for posting.
This is a picture from the article I mentioned:
I really don't think we have much to worry about if we stick to the cards recommended in the article. The article, as you may guess from the image I posted, specifically said to avoid the card the Amazon poster was having trouble with.
Here is the direct link to that article: 64GB Micro SD cards for Blackvue DR650GW-2CH,DR600GW and DR750LW-CH (Page 1) / The Best 64GB Micro SD for Blackvue DR650GW-2CH,DR600GW and DR750LW-CH Dashcams / Blackvue UK Forum
From this point forward let's try to keep discussion of what cards will and won't work with the Blackvue 650 to a more appropriate thread, and keep this one for discussion of the group buy.