Amazon.com: SanDisk Ultra SDXC 128GB SD Card for Olympus Mirrorless Camera Works with OM-D E-M10 IV, OM-D E-M5 III (SDSDUNR-128G-GN6IN) Bundle with (1) Everything But Stromboli SD & Micro Memory Card Reader :
Olympus E-M10 Mark II • How to format SD card - YouTube
Olympus OM-D E-M10 Mark II SD Card Replacement - iFixit Repair Guide
Olympus E-1 Digital Camera Memory Card 8GB CompactFlash Memory Card - Walmart.com