Motorola Moto G7 Power Manual page 8

4. Push the tray back into the phone.
Performance warning
We recommend use of a high speed card , such as a UHS-1 type. Class 4 and Class 2 micro SD
cards are not recommended. The performance of these cards is typically 10x slower than internal
storage performance.
High speed card are identified by these logos:
If your card it too slow, your device will warn your during the adoption process. If you encounter
this dialog, we advise to upgrade your card to a UHS-1 card first.
When you insert an SD card for the first time, you can choose to either use the card as Portable
Storage or Internal Storage.