How to Delete SD Memory Card Partitions. You must format an SD card prior to using it for storage. However, if you format the SD card into more than one partition, you can only use the active ...

Inserting / Removing SIM and SD cards Before doing the steps below, we recommend that you turn your phone off to avoid your SIM card being damaged or your SD card corrupted.

It is recommended to unmount your SD card before you remove it from your device to prevent data corruption. To unmount the microSD card on your Galaxy S9+, follow these steps: ...