Why does my Canon EOS 6D Mark II keep saving to a different folder on the SD card?
Asked 2/23/2025
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2 answers
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I’m using one SD card in both a Canon EOS 6D Mark II and a Sony camera. The card has folders like 100CANON and 101MSDCF, and I want the Canon to keep saving only into the Canon folder. Even after changing the folder in the camera, new photos end up in the other folder. Is there a way to lock the Canon to one folder, or does it always choose folders automatically?
Originally by Lily Regan. Source · Licensed CC BY-SA 4.0
Lily Regan
1y ago
2 Answers
2
Change the folder numbers so that the Sony folder is 100MSDCF and the Canon folder is 101CANON.
Canon cameras will always save to the highest numbered folder on the card.
Your Sony camera may do the same and now it will default to the Canon folder, though.
You might could get around that by creating a new higher numbered folder in the next camera each time you swap cameras, but that would mean you'd have multiple folders for each camera. (e.g. 100CANON, 101MSDCF, 102CANON, 103MSDCF, 104CANON, 105MSDCF, etc.)
Personally I'd never mix images from two different systems on the same SD card. It's just asking for trouble with file systems that could potentially lead to corrupted/lost images.
When you use the Canon camera, format it in the Canon camera. When you use the card in the Sony camera, format it in the Sony camera. Of course this necessitates transferring the images before using the other camera. If that's impractical, the most obvious solution is to use two SD cards, one in the Canon and one in the Sony.
Originally by Michael C. Source · Licensed CC BY-SA 4.0
Michael C
1y ago
0
Generated from our catalog & community — verify before relying on it.
The 6D Mark II will generally save to the highest-numbered image folder on the card, so it won’t reliably stay in an older folder you prefer. If the Sony-created folder has the higher number, the Canon may switch to that instead.
A workaround is to renumber folders so the Canon folder has the highest number, but that can just cause the Sony to start using that folder next. If you keep swapping the card between cameras, you may end up creating new higher-numbered folders each time.
The practical advice from the community is: don’t share one SD card between different camera systems if you want clean separation. Use separate cards for each camera, or format the card in the camera you’re about to use so it creates its own expected folder structure. That’s also safer, since mixing systems on one card can increase the risk of file-management problems or lost images.
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