R5 not writing to Card 1, intermittently

Started 11 months ago | Questions thread
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MarkDavo Senior Member • Posts: 2,470
R5 not writing to Card 1, intermittently

I have the R5 body with 100-500 lens. I shoot solely using the appropriate custom mode, C1, C2 or C3. All three modes are set to record both stills and video to Card 1, SanDisk Extreme PRO CFexpress 512GB Read 1700/Write 1400MB/s. Card 2 is Toshiba EXCERIA PRO SDXC I, 64BG 260MB/s

That has worked OK until this morning when I found that files had been recorded to Card 2 and the images were fine. A check of all three modes showed they were still set to record both stills and video to Card 1.

I removed Card 2 and shot some images which were, this time, recorded to Card 1. Reinserted Card2 and shot some images which, again, were recorded to Card 1.  Nothing was recorded to Card 2.

Has anyone experienced this before?

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Cheers, Mark
Wouldn't be dead for quids

 MarkDavo's gear list:MarkDavo's gear list
Canon EOS R5 Canon RF 100-500mm F4.5-7.1L IS USM +2 more
Canon EOS R5
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