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Hi All ....
I recently purchased some "Extreme Pro" (170MB/s) SanDisk cards (64GB) for my Canon 70D's.
Wierd thing is - the 70D won't enter into 'ML mode' when pressing the Rubbish-Bin button (the cards work OK for 'normal' 70D recording without ML). My Samsung EVO Plus micro SD cards have always worked with ML, so the only new variable is the SanDisk cards. And I can replicate this on 3x70D bodies.
Is there an issue with these cards? - Have SanDisk changed something other than the 170MB/s read speed - seems there's some compatability issue. I was wanting to go to SanDisk so as to have Full sized SD's rather than micros with adapters ...

Thanks.

BTW - The build I'm using is:
https://bitbucket.org/ArcziPL/magic-lantern/downloads/magiclantern-Nightly.2019Mar07.70D112_crop_rec_4k_mlv_lite_lossless.zip
I also tried the 2019 March 24th build (which also always worked on the EVO cards). Again the 70D is not recognizing ML at all. It's as though ML isn't on the card (but it definately is).

Greetings ..... Could someone kindly tell me why this *read-out* (please see pic) - is sometimes high (like 39.2 MB/sec) and at other times low (like 32 MB/sec) - or anywhere in between. It seems as though every time I turn on the 70D, my expected recording time can vary considerably. eg: A RAW file might sometimes yield 17 seconds or 25 seconds or even 30 seconds, yet the 'settings' have not been altered. It's just that the currently estimated 'write speed' varies so much. It's the yellow message that reads (for example) "Expect 694-780 frames at 38.3MB/s"  (please see pic).

Thankyou 

https://www.dropbox.com/s/s22ehidafouslw5/Write%20Speed%20changing.jpg?dl=0