Hello,
UFX+ recording 12 channels of MADI input at 192 (locked to MADI).  Purchased four Ultra Flair 64gig SanDisk sticks for DURec recording.  Two of the sticks worked fine (consistent recording average 75-85%, 0 errors).  Two sticks would immediately climb above 100% and give rapid errors. 
Any thoughts as to why this occurred?  Would like to diagnose the reason and perhaps find larger more stable drives endorsed by RME. (I know I am reading the sticky now as well).
Thanks.