Can I use both SD and Micro SD card slots simultaneously? John April 02, 2021 22:20 Updated Follow A. No, only one card slot can be used at a time. Either the SD card slot or the Micro SD card slot can be used at a time. Related articles What Macbook is this compatible with? How do I connect the hub on my 13 inch MacBook Pro? Type-C Compatibility How long is the battery life? Speeds and compatibility? Comments 0 comments Please sign in to leave a comment.