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According to the specs on dpreview, that camera has a UHS-I slot and a UHS-II slot, but I assume you're more familiar with the camera if you own it. This is a UHS-II card, so you can use it in either slot, but if you put it in the UHS-I slot, you won't get the speed performance of UHS-II.
Sorry, there was a problem. Please try again later.Yes, the SanDisk® SDXC UHS-II Extreme PRO 128GB Memory Card is compatible with the Olympus E-M1 Mark-III as it supports SDXC UHS-II Memory Card.
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