In some situations full sized SD Cards may not be detected when in the read only or 'locked' position when inserted into a USBC-7IN1. The lock position on full sized SD Cards is not meant to lock access to these cards, it is intended to make the card read only.
Pictured below, a full sized SD Card with the card lock enabled.
At this time the best solution to mitigate this problem is to 'unlock' the SD Card before inserting the card into the USBC-7IN1. We do understand that perhaps this is not a viable solution for you, and if this is the case please reach out to us for further assistance. You can do so by emailing us at email@example.com, please be sure to describe the problem.
* Please Note: This problem is only known to affect the USBC-7IN1.