I' ve been recording clips with a Canon 80D and a Lexxar Profesional x633 SDXC card 64 GB class 10, 95 MB/s max read speed. Video format was MOV at 1080p, 25 fps.
I never had a problem for almost a year with 80D and two years using this Lexxar SD card. But yesterday I just took my cam, (which was off and cool) tried to film, immediately saw the low recording speed bar adviser, and video stopped automatically. Same happened once and again.
Is my card is losing performance due to intense use? Or might the issue be related to used storage (around 75% of SD total was filled, mostly with cr2 raw photo files and JPEGs, at moment of filming).
I don't know if it makes any difference, but battery charge was at its half. Video stopped just some seconds after start, so file size issues are out of debate.