Yeah, I'm familiar with SanDisk QuickFlow... and it has a HUUUUUUGE limitation:
First off, QuickFlow only works with a compatible host device. I guarantee no Autel drone (or DJI or Canon camera for that matter) is using QuickFlow. It's a method to get around the limitations of UHS-I. Since no drones I know of even have a UHS-II compatible card slot nor do they utilize more than 104MB/s of throughput it's not really relevant here. I'd be surprised if QuickFlow is doing anything for you at all on the camera side... because it requires that the device implement QuickFlow (and the only devices that do are SanDisk card readers).
I think you should re-read my post that you are referencing in order to fully understand what it said because I was very specific with my references; admittedly probably not as clear as I should have been but for brevity I did not go into every single detail. But you did make a lot of assumptions and statements that I never made or said.
So first off I never said the technology was needed for any drone that I am aware of, in fact I said the same thing you did; there is no drone that I know of that needs a V90 microSD card or has a UHS-II slot. I also never said the QuickFlow technology was compatible with Autel drones; in fact, QuickFlow technology isn't even available in their 32GB microSD cards and is only available in their larger capacity SD cards. My only point regarding the technology is that it is an indication that SanDisk is pushing the technology boundaries and continuing to innovate and it is also an example where SanDisk V30 cards can in fact exceed their V30 ratings for sustained periods of time when used with compatible HW.
Second, those high write speeds are generally only for a short duration. The cards can not sustain those write speeds for the entire capacity of the card. This is specifically what V90/V60/V30 mean. A V90 card can sustain 90MB/s (or greater) over the entire capacity of the card... and that's why V90 cards are so expensive. I guarantee your SanDisk V30s can't sustain anywhere near 95MB/s for the entire duration of their capacity. How do I know this? I've done sustained write tests against SanDisk Extreme Pro cards. If you want sustained write speeds in the V60/V90 range, you simply can't use V30 cards.
Again, you are saying the same thing I said, but for brevity since it wasn't important to the OP I did not go into all of the details. I never said the SanDisk microSD cards could maintain sustained V60 or V90 speeds; what I said is that the SanDisk Extreme Pro microSD cards tops out (maximum speed not sustained write speed) at 95MB/s I also specifically mentioned sustained write speeds in my post. I have also performed benchmarking write tests against SanDisk cards and I am well aware that they cannot maintain V90 write speeds.
As for "all of the knockoff cards on Amazon and eBay being Lexar"... that's silly. They're cranked out of some of the same factories, but there are a lot of flash manufacturers over in China making white-label cards... not just the Longsys factories. I do agree that right now Lexar is a brand to be avoided.
I actually did a lot of research in this area years ago, it is very difficult to make flash memory at the scale needed to make a profit so no, there's not dozens of mom and pop shops churning out white label SD cards, maybe the word all was a bit strong, but I would estimate over
90% of them can be traced back to Lexar/Longsys and they offer white labelling services. If you trace nearly any generic microSD card through Alibaba you will see it comes from Longsys. When I did the research years ago it was 100%, maybe some others are now offering white label services but the chances are still highest that you are buying a rebranded Lexar microSD card.
Sandisk DOES make V90 cards... just not microSD cards.
Again, re-read my post, I did not say SanDisk does not make V90 cards, I said SanDisk does not make high capacity V90 cards. I also did not say microSD cards because I was referring to SD cards which I also later refer to in the same sentence, I should have been clearer but I did make references to SD cards at that point not microSD cards.
I'm also curious what you're using microSD cards in that requires V90s... because I'm not aware of any drone or other device using micros that needs that kind of throughput. The only cameras I have that need V90 SDs are my Canon C70 and Canon R5 and those are full size SDs. I'm not even aware of a drone that has a UHS-II slot in it.
Again, I was referring to SD cards at this point which I did state SD cards not microSD cards when I was discussing V90 speeds. As far as needing V90 SD cards, I have C70s and the R5 as well, and the C70 is where I discovered that I only need V30 SanDisk SD cards when shooting Cinema Raw LT at 30FPS. This is also where I discovered that the SanDisk Extreme Pro V30 SD cards can in fact maintain sustained write speeds well above the V30 rating, however they cannot support 4K60FPS at Cinema Raw LT or any framerate at Cinema Raw ST. Additionally, SanDisk does not offer any V90 SD cards over 128GB which is why I said SanDisk does not support high capacity V90 SD cards so I got ProGrade 512GB V90 SD cards for those times when I need ST or Raw 60FPS. Since I rarely need either, I instead just use V30 SD cards and stick with LT @30FPS.
I have now shot plenty of longform content (everything from concerts to conferences) using the Cinema Raw LT codec with sustained data rates well above V30 speeds and the SanDisk SD cards have performed flawlessly.